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The coefficient of $x^5$ in $(1 + 2x + 3x^2 + ....)^{-3/2}$ is :

asked Dec 11, 2018 by pady_1

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Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity $\overrightarrow{u}$ and the other from rest with uniform acceleration $\overrightarrow{f}$. Let $\alpha$ be the angle between their directions of motion. The relative velocity of the second particle w.r.t. the first is least after a time :

asked Dec 11, 2018 by pady_1

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A piece of copper and another of germanium are cooled from room temperature to 77 K, the resistance of

asked Nov 5, 2018 by pady_1

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