Find the partial sum Sn of the geometric sequence that satisfies the given conditions.

Question

a = 7, r = 2, n = 6 

 

s6=

Answer 1

In your textbook you will find the formula for S_n = a(1-rⁿ) / (1-r).

 

It seems that you know a, r and n, so GET TO WORK SUBSTITUTING VALUES INTO THE FORMULA.