Find the 9th term in the sequence 9,-18,36

Step-by-step explanation:

hello:

the sequence 9,-18,36 is geometric when the common ratio is:

r = 36/-18=-18/9=-2

let (An) this sequence the n-ieme term is : An=A1*r^ (n-1) ... A1=9 and n=9

A9=9 * (-2) ^8 = 2304