Question

A geometric sequence has these terms: a
= 8, a2 = 20, az = 50, and a4 = 125.
Which formula can be used to find an?
O A. An = 8 + 12 (n - 1)
OB. An = 8+ (n − 1)
OC an = 8. 127-1
O D. an = 8(E)"
O E an = 8(?)"

Answer 1

Good evening ,

Answer:

An = 8×(5/2)ⁿ⁻¹

Step-by-step explanation:

An = A1 × qⁿ⁻¹

A1=8 and q = 20/8 = 5/2

then An = 8×(5/2)ⁿ⁻¹.

:)