A geometric series is a series with a constant ratio between successive terms. For example,
Since this ratio is common to all consecutive pairs of terms, it is called the common ratio denoted by r. Given by formula:
r = an+1/an
The general term of a geometric series is given as:
an = arn – 1
Sum of geometric series a + ar + ar2 + ar3 + ar4 + ar5 + …..+arn-1 is given as:
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