Gujarat BoardEnglish MediumSTD 11 CommerceStatisticsGeometric progression2 Marks
Question
Define Geometric series.
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Answer
If the consecutive terms of a geometric progression are expressed in terms of $a$ and $r$ as $a, a r, a r^2, \ldots$, , then $a+a r+a r^2$ $+\ldots .+a \cdot r^{n-1}$ is called geometric series. It is denoted by $S_n$, i.e., $S_n=a+a r+a r^2+\ldots .+a \cdot r^{n-1}$.
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