JEE (Advanced) 2017 Paper-2

Instructions

For the following questions answer them individually

Question 51

$$\mid\overrightarrow{OX}\times\overrightarrow{OY}\mid=$$

Video Solution

Question 52

If the triangle PQRvaries, then the minimum value of $$\cos(P+Q)+\cos(Q+R)+\cos(R+P)$$ is

Video Solution

Instructions

Let p,q be integers and let $$\alpha,\beta$$ be the roots of the equation, $$X^{2}-x-1=0$$, Where $$\alpha\neq\beta$$. For n=0,1,2..., Let $$a_{n}=p\alpha^{n}+q\beta^{n}$$.

FACT: If a and b are rational numbers and $$a+b\sqrt{5}=0$$, then $$a=0=b$$.

Question 53

$$a_{12}=$$

Video Solution

Question 54

If $$a_{4}=28$$, then $$p+2q=$$

Video Solution

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JEE (Advanced) 2017 Paper-2

$$\mid\overrightarrow{OX}\times\overrightarrow{OY}\mid=$$

If the triangle PQRvaries, then the minimum value of $$\cos(P+Q)+\cos(Q+R)+\cos(R+P)$$ is

$$a_{12}=$$

If $$a_{4}=28$$, then $$p+2q=$$

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CAT Quant Questions | CAT Quantitative Ability

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