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If $|x| < 1$, then the coefficient of $x^n$ in expansion of $(1 + x + x^2 + x^3 + ...)^2$ is :

asked Dec 11, 2018 by pady_1

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Two stones are projected from the top of a cliff $h$ metres high, with the same speed $u$ so as to hit the ground at the same spot. If one of the stones is projected horizontally and the other is projected at an angle $\theta$ to the horizontal, then $\tan \theta$ equals :

asked Dec 11, 2018 by pady_1

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The manifestation of band structure in solids is due to

asked Nov 5, 2018 by pady_1

0 answers

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