Math, asked by damodaran2008, 1 year ago

answer if you are sure and an ace

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Answered by mansurijishan805

Step-by-step explanation:

$sum \: a = \frac{first \: term \: (commen \: ratio ^{n} - 1) }{commen \: ratio \: - 1} \\ = \frac{1( {a}^{n} - 1 )}{a - 1} \\ = \frac{ {a}^{n} - 1}{a - 1} \\ \\( b) = \frac{ {a}^{n} - 1 }{a - 1}$

Answered by Anonymous

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answer if you are sure and an ace