# Solve the sum of 8 terms in a geometric series?

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Determine the sum of the first eight terms of the geometric series in which:

t1 = 42 and t9 = 10752

Determine the sum of the first eight terms of the geometric series in which:

t1 = 42 and t9 = 10752

The sum of the first 8 terms is

The first step would be finding the common ratio.

Applying this concept to our given problem, we see that

We know that the sum of a geometric series is given by

Applying this to our problem we get

Hopefully this helps!

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