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$$\left(P + \frac{a}{V^2}\right)(V - b) = RT$$ represents the equation of state of some gases. Where $$P$$ is the pressure, $$V$$ is the volume, $$T$$ is the temperature and $$a, b, R$$ are the constants. The physical quantity, which has dimensional formula as that of $$\frac{b^2}{a}$$, will be :
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An object moves with speed $$v_1, v_2$$ and $$v_3$$ along a line segment $$AB, BC$$ and $$CD$$ respectively as shown in figure. Where $$AB = BC$$ and $$AD = 3AB$$, then average speed of the object will be
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A child stands on the edge of the cliff 10 m above the ground and throws a stone horizontally with an initial speed of $$5 \text{ m s}^{-1}$$. Neglecting the air resistance, the speed with which the stone hits the ground will be ______ $$\text{m s}^{-1}$$ (given, $$g = 10 \text{ m s}^{-2}$$).
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A block of mass 5 kg is placed at rest on a table of rough surface. Now, if a force of 30 N is applied in the direction parallel to surface of the table, the block slides through a distance of 50 m in an interval of time 10 s. Coefficient of kinetic friction is (given, $$g = 10 \text{ m s}^{-2}$$):
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If earth has a mass nine times and radius twice to that of a planet $$P$$, then $$\frac{v_e}{3}\sqrt{x} \text{ ms}^{-1}$$ will be the minimum velocity required by a rocket to pull out of gravitational force of $$P$$, where $$v_e$$ is escape velocity on earth. The value of $$x$$ is
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Given below are two statements :
Statement-I: Acceleration due to gravity is different at different places on the surface of earth.
Statement-II: Acceleration due to gravity increases as we go down below the earth's surface.
In the light of the above statements, choose the correct answer from the options given below
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A mercury drop of radius $$10^{-3}$$ m is broken into 125 equal size droplets. Surface tension of mercury is $$0.45 \text{ N m}^{-1}$$. The gain in surface energy is:
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A sample of gas at temperature $$T$$ is adiabatically expanded to double its volume. The work done by the gas in the process is given, (given $$\gamma = \frac{3}{2}$$) :
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The average kinetic energy of a molecule of the gas is
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A steel wire with mass per unit length $$7.0 \times 10^{-3} \text{ kg m}^{-1}$$ is under tension of 70 N. The speed of transverse waves in the wire will be:
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Let $$\sigma$$ be the uniform surface charge density of two infinite thin plane sheets shown in figure. Then the electric fields in three different region $$E_I, E_{II}$$ and $$E_{III}$$
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The equivalent resistance between $$A$$ and $$B$$ of the network shown in figure
Find the magnetic field at the point P in figure. The curved portion is a semicircle connected to two long straight wires.
Match the List-I with List-II.
Choose the correct answer from the options given below:
Match the List-I with List-II:
Choose the correct answer from the options given below:
'$$n$$' polarizing sheets are arranged such that each makes an angle $$45°$$ with the proceeding sheet. An unpolarized light of intensity $$I$$ is incident into this arrangement. The output intensity is found to be $$\frac{I}{64}$$. The value of $$n$$ will be:
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A proton moving with one tenth of velocity of light has a certain de Broglie wavelength of $$\lambda$$. An alpha particle having certain kinetic energy has the same de-Broglie wavelength $$\lambda$$. The ratio of kinetic energy of proton and that of alpha particle is :
The mass of proton, neutron and helium nucleus are respectively 1.0073 u, 1.0087 u and 4.0015 u. The binding energy of helium nucleus is:
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Match the List I with List II
Choose the correct answer from the options given below:
Which of the following frequencies does not belong to FM broadcast.
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A small particle moves to position $$5\hat{i} - 2\hat{j} + \hat{k}$$ from its initial position $$2\hat{i} + 3\hat{j} - 4\hat{k}$$ under the action of force $$5\hat{i} + 2\hat{j} + 7\hat{k}$$ N. The value of work done will be ______ J.
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A solid cylinder is released from rest from the top of an inclined plane of inclination $$30°$$ and length 60 cm. If the cylinder rolls without slipping, its speed upon reaching the bottom of the inclined plane is ______ $$\text{m s}^{-1}$$. (Given $$g = 10 \text{ m s}^{-2}$$)
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A certain pressure '$$P$$' is applied to 1 litre of water and 2 litre of a liquid separately. Water gets compressed to 0.01% whereas the liquid gets compressed to 0.03%. The ratio of Bulk modulus of water to that of the liquid is $$\frac{3}{x}$$. The value of $$x$$ is ______.
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The amplitude of a particle executing SHM is 3 cm. The displacement at which its kinetic energy will be 25% more than the potential energy is: ______ cm.
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Two equal positive point charges are separated by a distance $$2a$$. The distance of a point from the centre of the line joining two charges on the equatorial line (perpendicular bisector) at which force experienced by a test charge $$q_0$$ becomes maximum is $$\frac{a}{\sqrt{x}}$$. The value of $$x$$ is ______.
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In an experiment to find emf of a cell using potentiometer, the length of null point for a cell of emf 1.5 V is found to be 60 cm. If this cell is replaced by another cell of emf $$E$$, the length of null point increases by 40 cm. The value of $$E$$ is $$\frac{x}{10}$$ V. The value of $$x$$ is ______.
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A charge particle of $$2 \mu C$$ accelerated by a potential difference of 100 V enters a region of uniform magnetic field of magnitude 4 mT at right angle to the direction of field. The charge particle completes semicircle of radius 3 cm inside magnetic field. The mass of the charge particle is ______ $$\times 10^{-18}$$ kg.
A series LCR circuit is connected to an ac source of 220 V, 50 Hz. The circuit contain a resistance $$R = 100 \Omega$$ and an inductor of inductive reactance $$X_L = 79.6 \Omega$$. The capacitance of the capacitor needed to maximize the average rate at which energy is supplied will be ______ $$\mu F$$.
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A thin cylindrical rod of length 10 cm is placed horizontally on the principle axis of a concave mirror of focal length 20 cm. The rod is placed in a such a way that mid point of the rod is at 40 cm from the pole of mirror. The length of the image formed by the mirror will be $$\frac{x}{3}$$ cm. The value of $$x$$ is ______.
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A light of energy 12.75 eV is incident on a hydrogen atom in its ground state. The atom absorbs the radiation and reaches to one of its excited states. The angular momentum of the atom in the excited state is $$\frac{x}{\pi} \times 10^{-17}$$ eVs. The value of $$x$$ is ______ (use $$h = 4.14 \times 10^{-15}$$ eVs, $$c = 3 \times 10^8 \text{ m s}^{-1}$$)
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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Hydrogen is an environment friendly fuel.
Reason R: Atomic number of hydrogen is 1 and it is a very light element.
In the light of the above statements, choose the correct answer from the options given below
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Match List I with List II
Choose the correct answer form the options given below:
Choose the correct statement(s):
A. Beryllium oxide is purely acidic in nature.
B. Beryllium carbonate is kept in the atmosphere of $$CO_2$$.
C. Beryllium sulphate is readily soluble in water.
D. Beryllium shows anomalous behavior.
Choose the correct answer from the options given below:
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Resonance in carbonate ion $$CO_3^{2-}$$ i
shown with three resonance structures. Which of the following is true?
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But-2-yne is reacted separately with one mole of Hydrogen as shown below:
Identify the incorrect statements from the options given below:
A. A is more soluble than B.
B. The boiling point & melting point of A are higher and lower than B respectively.
C. A is more polar than B because dipole moment of A is zero.
D. $$Br_2$$ adds easily to B than A.
How can photochemical smog be controlled?
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Which of the following represents the lattice structure of $$A_{0.95}O$$ containing $$A^{2+}, A^{3+}$$ and $$O^{2-}$$ ions
(A)
(B)
(c)
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Amongst He, Ne, Ar and Kr; 1 g of activated charcoal adsorbs more of Kr.
Reason R: The critical volume $$V_c$$ $$(cm^3 mol^{-1})$$ and critical pressure $$P_c$$ (atm) is highest for Krypton but the compressibility factor at critical point $$Z_c$$ is lowest for Krypton.
In the light of the above statements, choose the correct answer from the options given below.
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: In an Ellingham diagram, the oxidation of carbon to carbon monoxide shows a negative slope with respect to temperature.
Reason R: CO tends to get decomposed at higher temperature.
In the light of the above statements, choose the correct answer from the options given below
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Given below are two statements:
Statement I: Chlorine can easily combine with oxygen to form oxides: and the product has a tendency to explode.
Statement II: Chemical reactivity of an element can be determined by its reaction with oxygen and halogens.
In the light of the above statements, choose the correct answer from the options given below
A solution of $$FeCl_3$$ when treated with $$K_4[Fe(CN)_6]$$ gives a prussian blue precipitate due to the formation of
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Highest oxidation state of Mn is exhibited in $$Mn_2O_7$$. The correct statements about $$Mn_2O_7$$ are
(A) Mn is tetrahedrally surrounded by oxygen atoms
(B) Mn is octahedrally surrounded by oxygen atoms
(C) Contains Mn - O - Mn bridge
(D) Contains Mn - Mn bond.
Choose the correct answer from the options given below
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Which of the following complex will show largest splitting of d-orbitals?
Which of the following are the example of double salt?
(A) $$FeSO_4 \cdot (NH_4)_2SO_4 \cdot 6H_2O$$
(B) $$CuSO_4 \cdot 4NH_3 \cdot H_2O$$
(C) $$K_2SO_4 \cdot Al_2(SO_4)_3 \cdot 24H_2O$$
(D) $$Fe(CN)_2 \cdot 4KCN$$
Choose the correct answer.
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Identify the incorrect option from the following:
Decreasing order of dehydration of the following alcohols is
In the following reaction, 'A' is:
Match List I with List II
Choose the correct answer from the options given below:
The correct representation in six membered pyranose form for the following sugar [X] is:
Sugar [X] has the Fischer projection: CHO, HO-H, HO-H, H-OH, H-OH, $$H_2COH$$
Match List I and List II
Choose the correct answer from the options given below:
The density of 3M solution of NaCl is $$1.0 \text{ g mL}^{-1}$$. Molality of the solution is ______ $$\times 10^{-2}$$ m (Nearest integer).
Given: Molar mass of Na and Cl is 23 and 35.5 $$\text{g mol}^{-1}$$ respectively.
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Electrons in a cathode ray tube have been emitted with a velocity of $$1000 \text{ ms}^{-1}$$. The number of following statements which is/are true about the emitted radiation is
Given: $$h = 6 \times 10^{-34}$$ Js, $$m_e = 9 \times 10^{-31}$$ kg
(A) The deBroglie wavelength of the electron emitted is 666.67 nm
(B) The characteristic of electrons emitted depend upon the material of the electrodes of the cathode ray tube.
(C) The cathode rays start from cathode and move towards anode.
(D) The nature of the emitted electrons depends on the nature of the gas present in cathode ray tube.
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At 25°C, the enthalpy of the following processes are given:
$$H_2(g) + O_2(g) \rightarrow 2OH(g) \quad \Delta H^o = 78 \text{ kJ mol}^{-1}$$
$$H_2(g) + \frac{1}{2}O_2(g) \rightarrow H_2O(g) \quad \Delta H^o = -242 \text{ kJ mol}^{-1}$$
$$H_2(g) \rightarrow 2H(g) \quad \Delta H^o = 436 \text{ kJ mol}^{-1}$$
$$\frac{1}{2}O_2(g) \rightarrow O(g) \quad \Delta H^o = 249 \text{ kJ mol}^{-1}$$
What would be the value of X for the following reaction? (Nearest integer)
$$H_2O(g) \rightarrow H(g) + OH(g) \quad \Delta H^o = X \text{ kJ mol}^{-1}$$
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(i) $$X(g) \rightleftharpoons Y(g) + Z(g) \quad K_{p1} = 3$$
(ii) $$A(g) \rightleftharpoons 2B(g) \quad K_{p2} = 1$$
If the degree of dissociation and initial concentration of both the reactants $$X(g)$$ and $$A(g)$$ are equal, then the ratio of the total pressure at equilibrium $$\frac{p_1}{p_2}$$ is equal to x : 1. The value of x is (Nearest integer)
The total number of chiral compound/s from the following is
25 mL of an aqueous solution of KCl was found to require 20 mL of 1M $$AgNO_3$$ solution when titrated using $$K_2CrO_4$$ as an indicator. What is the depression in freezing point of KCl solution of the given concentration? (Nearest integer).
(Given: $$K_f = 2.0 \text{ K kg mol}^{-1}$$)
Assume 1) 100% ionization and 2) density of the aqueous solution as $$1 \text{ g mL}^{-1}$$
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At what pH, given half cell $$MnO_4^-(0.1 M) | Mn^{2+}(0.001 M)$$ will have electrode potential of 1.282 V? (Nearest Integer)
Given $$E^o_{MnO_4^-/Mn^{2+}} = 1.54$$ V, $$\frac{2.303RT}{F} = 0.059$$ V
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A and B are two substances undergoing radioactive decay in a container. The half life of A is 15 min and that of B is 5 min. If the initial concentration of B is 4 times that of A and they both start decaying at the same time, how much time will it take for the concentration of both of them to be same? ______ min.
Sum of oxidation states of bromine in bromic acid and perbromic acid is
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Number of isomeric compounds with molecular formula $$C_9H_{10}O$$ which
(i) do not dissolve in NaOH
(ii) do not dissolve in HCl.
(iii) do not give orange precipitate with 2, 4 - DNP
(iv) on hydrogenation give identical compound with molecular formula $$C_9H_{12}O$$ is
Let $$S = \{x : x \in \mathbb{R} \text{ and } (\sqrt{3} + \sqrt{2})^{x^2-4} + (\sqrt{3} - \sqrt{2})^{x^2-4} = 10\}$$. Then $$n(S)$$ is equal to
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If the center and radius of the circle $$\left|?\frac{z-2}{z-3} \right| = 2$$ are respectively $$(?lpha, ?eta)$$ and $$\gamma$$, then $$3(?lpha + ?eta + \gamma)$$ is equal to
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The sum to 10 terms of the series $$\frac{1}{1+1^2+1^4} + \frac{2}{1+2^2+2^4} + \frac{3}{1+3^2+3^4} + \ldots$$ is :-
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The value of $$\frac{1}{1!50!} + \frac{1}{3!48!} + \frac{1}{5!46!} + \ldots + \frac{1}{49!2!} + \frac{1}{51!1!}$$ is
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The combined equation of the two lines $$ax + by + c = 0$$ and $$a'x + b'y + c' = 0$$ can be written as $$(ax + by + c)(a'x + b'y + c') = 0$$. The equation of the angle bisectors of the lines represented by the equation $$2x^2 + xy - 3y^2 = 0$$ is
If the orthocentre of the triangle, whose vertices are $$(1, 2), (2, 3)$$ and $$(3, 1)$$ is $$(\alpha, \beta)$$, then the quadratic equation whose roots are $$\alpha + 4\beta$$ and $$4\alpha + \beta$$, is
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The negation of the expression $$q \vee ((\sim q) \wedge p)$$ is equivalent to
The mean and variance of 5 observations are 5 and 8 respectively. If 3 observations are 1, 3, 5, then the sum of cubes of the remaining two observations is
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For a triangle $$ABC$$, the value of $$\cos 2A + \cos 2B + \cos 2C$$ is least. If its inradius is 3 and incentre is $$M$$, then which of the following is NOT correct?
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Let $$R$$ be a relation on $$\mathbb{R}$$, given by $$R = \{(a, b) : 3a - 3b + \sqrt{7} \text{ is an irrational number}\}$$. Then $$R$$ is
Let $$S$$ denote the set of all real values of $$\lambda$$ such that the system of equations
$$\lambda x + y + z = 1$$
$$x + \lambda y + z = 1$$
$$x + y + \lambda z = 1$$
is inconsistent, then $$\sum_{\lambda \in S} (\lambda^2 + \lambda)$$ is equal to
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Let $$S$$ be the set of all solutions of the equation $$\cos^{-1}(2x) - 2\cos^{-1}(\sqrt{1-x^2}) = \pi, x \in \left[-\frac{1}{2}, \frac{1}{2}\right]$$. Then $$\sum_{x \in S} \left(2\sin^{-1}(x^2) - 1\right)$$ is equal to
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Let $$f(x) = 2x + \tan^{-1}(x)$$ and $$g(x) = \log_e(\sqrt{1+x^2} + x), \quad x \in [0, 3]$$. Then
Let $$f(x) = \begin{vmatrix} 1+\sin^2 x & \cos^2 x & \sin 2x \\ \sin^2 x & 1+\cos^2 x & \sin 2x \\ \sin^2 x & \cos^2 x & 1+\sin 2x \end{vmatrix}$$, $$x \in \left[\frac{\pi}{6}, \frac{\pi}{3}\right]$$. If $$\alpha$$ and $$\beta$$ respectively are the maximum and the minimum values of $$f$$, then
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$$\lim_{n \to \infty} \left(\frac{1}{1+n} + \frac{1}{2+n} + \frac{1}{3+n} + \ldots + \frac{1}{2n}\right)$$ is equal to :-
The area enclosed by the closed curve $$C$$ given by the differential equation $$\frac{dy}{dx} + \frac{x+a}{y-2} = 0$$, $$y(1) = 0$$ is $$4\pi$$. Let $$P$$ and $$Q$$ be the points of intersection of the curve $$C$$ and the $$y$$-axis. If normals at $$P$$ and $$Q$$ on the curve $$C$$ intersect $$x$$-axis at points $$R$$ and $$S$$ respectively, then the length of the line segment $$RS$$ is
If $$y = y(x)$$ is the solution curve of the differential equation $$\frac{dy}{dx} + y\tan x = x\sec x$$, $$0 \leq x \leq \frac{\pi}{3}$$, $$y(0) = 1$$, then $$y\left(\frac{\pi}{6}\right)$$ is equal to
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Let the image of the point $$P(2, -1, 3)$$ in the plane $$x + 2y - z = 0$$ be $$Q$$. Then the distance of the plane $$3x + 2y + z + 29 = 0$$ from the point $$Q$$ is
The shortest distance between the lines $$\frac{x-5}{1} = \frac{y-2}{2} = \frac{z-4}{-3}$$ and $$\frac{x+3}{1} = \frac{y+5}{4} = \frac{z-1}{-5}$$ is
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In a binomial distribution $$B(n, p)$$, the sum and product of the mean & variance are 5 and 6 respectively, then find $$6(n + p - q)$$ is equal to :-
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The number of words, with or without meaning, that can be formed using all the letters of the word ASSASSINATION so that the vowels occur together, is _____.
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Let $$a_1 = 8, a_2, a_3, \ldots, a_n$$ be an A.P. If the sum of its first four terms is 50 and the sum of its last four terms is 170, then the product of its middle two terms is _____.
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The number of 3-digit numbers, that are divisible by either 2 or 3 but not divisible by 7 is _____.
The remainder when $$19^{200} + 23^{200}$$ is divided by 49, is _____.
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If $$f(x) = x^2 + g'(1)x + g''(2)$$ and $$g(x) = f(1)x^2 + xf'(x) + f''(x)$$, then the value of $$f(4) - g(4)$$ is equal to _____.
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If $$\int_0^1 x^{21} + x^{14} + x^7 2x^{14} + 3x^7 + 6^{1/7} dx = \frac{1}{l}(11)^{m/n}$$ where $$l, m, n \in \mathbb{N}$$, $$m$$ and $$n$$ are co-prime then $$l + m + n$$ is equal to _____.
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Let $$A$$ be the area bounded by the curve $$y = x|x-3|$$, the $$x$$-axis and the ordinates $$x = -1$$ and $$x = 2$$. Then $$12A$$ is equal to _____.
Let $$f: \mathbb{R} \to \mathbb{R}$$ be a differentiable function such that $$f'(x) + f(x) = \int_0^2 f(t) dt$$. If $$f(0) = e^{-2}$$, then $$2f(0) - f(2)$$ is equal to _____.
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Let $$\vec{v} = \alpha\hat{i} + 2\hat{j} - 3\hat{k}$$, $$\vec{w} = 2\alpha\hat{i} + \hat{j} - \hat{k}$$, and $$\vec{u}$$ be a vector such that $$|\vec{u}| = \alpha > 0$$. If the minimum value of the scalar triple product $$[\vec{u} \quad \vec{v} \quad \vec{w}]$$ is $$-\alpha\sqrt{3401}$$, and $$|\vec{u} \cdot \hat{i}|^2 = \frac{m}{n}$$ where $$m$$ and $$n$$ are coprime natural numbers, then $$m + n$$ is equal to _____.
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$$A(2, 6, 2), B(-4, 0, \lambda), C(2, 3, -1)$$ and $$D(4, 5, 0)$$, $$\lambda \leq 5$$ are the vertices of a quadrilateral $$ABCD$$. If its area is 18 square units, then $$5 - 6\lambda$$ is equal to _____.
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