Question

Determine if the sequence is geometric if it is find the common ratio , the 8th term and the explicit formula
1. 4 , -8 , 16, -32
A. Common Ratio : r=-1/2
a8=-3/128
B. Common ratio : r=-2
a8=-512
Explicit : an=4x(-2)^n-1
C. Common Ratio : r=-2
a8=-384
Explicit : an=3(-2)^n-1
D. Common Ratio:r=-2
a8=192
Explicit : an=-3/2 x(-2)^n-1

Answer 1

@bahrom7893

Answer 2

@mathstudent55