I'm really troubled with this question. Can anybody help?

"If we have a geometric sequence with initial term a and ratio r, then is the formula for the ninth term of the corresponding geometric series is given by

s_n = a 1-r/1-r^n ?"

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- Apr 28th 2009, 03:42 AM14041471Geometric sequences
I'm really troubled with this question. Can anybody help?

"If we have a geometric sequence with initial term a and ratio r, then is the formula for the ninth term of the corresponding geometric series is given by

s_n = a 1-r/1-r^n ?" - Apr 28th 2009, 03:51 AMAir