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Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class11  >>  Sequence and Series
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In a GP, the ratio of the sum of first 3 terms to the sum of first 6 terms is 125/152. Find the common of the GP.

$1 \\ 5/6 \\ 3/5 \\ 6/5 $

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Answer : (c) 3/5
$Explanation : S_{n}=a\;\frac{r^n-1}{r-1}\;in\;GP$
$Given \;that $
$Assuming \;r\;\neq\;1$
$(as\; r-1\;is\;in\;denominator\;\xi\;denomitor\;cannot\;be\;0\;,r-1\;\neq\;0,\;r\;\neq\;1)$
answered Dec 31, 2013 by yamini.v

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