NTA JEE Mains 31th Jan 2024 Shift 1

Let $$S$$ be the set of positive integral values of $$a$$ for which $$\frac{ax^2 + 2(a+1)x + 9a + 4}{x^2 - 8x + 32} < 0, \forall x \in \mathbb{R}$$. Then, the number of elements in $$S$$ is:

For $$0 < c < b < a$$, let $$(a + b - 2c)x^2 + (b + c - 2a)x + (c + a - 2b) = 0$$ and $$\alpha \neq 1$$ be one of its root. Then, among the two statements (I) If $$\alpha \in (-1, 0)$$, then $$b$$ cannot be the geometric mean of $$a$$ and $$c$$. (II) If $$\alpha \in (0, 1)$$, then $$b$$ may be the geometric mean of $$a$$ and $$c$$.

The sum of the series $$\frac{1}{1 - 3 \cdot 1^2 + 1^4} + \frac{2}{1 - 3 \cdot 2^2 + 2^4} + \frac{3}{1 - 3 \cdot 3^2 + 3^4} + \ldots$$ up to 10 terms is

Let $$\alpha, \beta, \gamma, \delta \in \mathbb{Z}$$ and let $$A(\alpha, \beta), B(1, 0), C(\gamma, \delta)$$ and $$D(1, 2)$$ be the vertices of a parallelogram $$ABCD$$. If $$AB = \sqrt{10}$$ and the points $$A$$ and $$C$$ lie on the line $$3y = 2x + 1$$, then $$2(\alpha + \beta + \gamma + \delta)$$ is equal to

If one of the diameters of the circle $$x^2 + y^2 - 10x + 4y + 13 = 0$$ is a chord of another circle $$C$$, whose center is the point of intersection of the lines $$2x + 3y = 12$$ and $$3x - 2y = 5$$, then the radius of the circle $$C$$ is

If the foci of a hyperbola are same as that of the ellipse $$\frac{x^2}{9} + \frac{y^2}{25} = 1$$ and the eccentricity of the hyperbola is $$\frac{15}{8}$$ times the eccentricity of the ellipse, then the smaller focal distance of the point $$\left(\sqrt{2}, \frac{14}{3}\sqrt{\frac{2}{5}}\right)$$ on the hyperbola, is equal to

$$\lim_{x \to 0} \frac{e^{2\sin x} - 2\sin x - 1}{x^2}$$

Let $$a$$ be the sum of all coefficients in the expansion of $$(1 - 2x + 2x^2)^{2023}(3 - 4x^2 + 2x^3)^{2024}$$ and $$b = \lim_{x \to 0} \frac{\int_0^x \frac{\log(1+t)}{t^{2024}+1}dt}{x^2}$$. If the equations $$cx^2 + dx + e = 0$$ and $$2bx^2 + ax + 4 = 0$$ have a common root, where $$c, d, e \in \mathbb{R}$$, then $$d : c : e$$ equals

If $$f(x) = \begin{vmatrix} x^3 & 2x^2+1 & 1+3x \\ 3x^2+2 & 2x & x^3+6 \\ x^3-x & 4 & x^2-2 \end{vmatrix}$$ for all $$x \in \mathbb{R}$$, then $$2f(0) + f'(0)$$ is equal to

If the system of linear equations $$x - 2y + z = -4$$, $$2x + \alpha y + 3z = 5$$, $$3x - y + \beta z = 3$$ has infinitely many solutions, then $$12\alpha + 13\beta$$ is equal to