Question

Find the 9th term of the geometric sequence
9, -18, 36

Answer 1

Explanation:

Geometric sequence: 9, -18 , 36 .....

common ratio = 2nd term / 1st term

= -18 /9 = -2

`a_(n)=ar^(n-1)\\\\a_(9)=9*(-2)^(8)\\\\=9*256\\\\= 2304`