Lindhmickaylie Lindhmickaylie

05-07-2016
Mathematics

Answered

what is the sum of the first six terms of the geometric series 4 − 12 36 − . . . ?

Verified Answer :

05-07-2016

The formula to use for the sum of n terms is as follows:
\(S_{n}=\frac{a(1-r^{n})}{1-r}\)
r = -3, n = 6.
\(S_{6}=\frac{4(1-(-3)^{6})}{1-(-3)}=-728\)

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