SOLUTION: Find the sum indicated for each of the geometric series listed 3 + 9 + 27 + ..., find S10

Algebra ->  Sequences-and-series -> SOLUTION: Find the sum indicated for each of the geometric series listed 3 + 9 + 27 + ..., find S10      Log On

Hi

Geometric Series: {3,9,27 ...} r = 3  

 = a(1-r^10)/(1-r)

 = 3(1-3^10)/(-2) = 3*-59048/-2 = 88,572