A geometric sequence has these terms: a1 = 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. 121-1
OD. an = 8()-1
O E. On = 8(?)"