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JEE Main 2013 Mathematics question

MathematicsSequence and SeriesJEE Main 2013

If x, y, z are positive numbers in A.P. and , and are also in A.P., then which of the following is correct.

Answer: (3)

Solution

\tan^{-1}\tan^{-1}\tan^{-1}\frac{2y}{1 - y^2}\frac{x + z}{1 - xz}$ =

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Question ID VK-103869