Question

Find the sum of the first 10 terms of the following series, to the nearest integer. 10, 40,160

Answer 1

Answer:3495250

Step-by-step explanation:

~geometric sequence

common ratio: r=4

formula: Sn=a1(1-r^n)/1-r

Sn=10(1-(4)^10)/1-4

=-10485750/-3

=3495250