Question

Find the explicit formula for the geometric sequence. Then find a8.
4, 8, 16, 64, ....

Which Answer is Correct:
A) an = 4 ⋅ rn – 1; 1,024
B) an = a1 ⋅ 2n – 1; 256
C) an = 4 ⋅ 2n – 1; 512
D) an = 2 ⋅ 4n – 1; 512

Answer 1

This answer is C. Hope this helps