Question

Find the 10th term of the geometric sequence 8, -24, 72, ...

Answer 1

Explanation:

r=-24/8=72/-24=-3

By using this equation:

a(n)=a(1)*r^(n-1)

and we have a(1)=8 , r=-3

a(n)=8*(-3)^(n-1)

a(10)=8*(-3)^(10-1)

=8*(-3)^9

=-157464

hope this helps