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  4. If a = (√6 + √5/√6 - √5) and b = (√6 - √5/√6 + √5) then (1/a2) + (1/b2) is equal to :

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Q. If $a = \frac{\sqrt{6} + \sqrt{5}}{\sqrt{6} - \sqrt{5}}$ and $b = \frac{\sqrt{6} - \sqrt{5}}{\sqrt{6} + \sqrt{5}}$ then $\frac{1}{a^2} + \frac{1}{b^2}$ is equal to :

UPSEEUPSEE 2018

Solution:

Correct answer is (b) 482