Question
$\mathop {\lim }\limits_{n \to \infty } \frac{1}{2} + \frac{1}{{{2^2}}} + \frac{1}{{{2^3}}} + ... + \frac{1}{{{2^n}}} = $
$\mathop {\lim }\limits_{n \to \infty } \,\left[ {1 - \frac{1}{{{2^n}}}} \right] = 1 - 0 = 1$
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$x+y+z=6$
$2 x+5 y+\alpha z=\beta$
$x+2 y+3 z=14$
के अनन्त हल है. तो $\alpha+\beta$ बराबर है