Question

Write the recursive formula for the geometric sequence.

a1 = -2 a2 = 8 a3 = -32

A. an = -4 + an-1

B. an = -2 + an-1

C. an = -2 • an-1

D. an = -4 • an-1

Answer 1

there are subsripts

Answer 2

\[ \large a_1=-2 \]
\[ \large a_2=8=(-4)(-2)=(-4)a_1 \]
\[ \large a_3=-32=(-4)(8)=(-4)a_2 \]