Question

Express the terms of the following geometric sequence by giving an explicit formula. 2 , 10 , 50 , 250 , 1,250 , ...

A. f(n) = 5(2)n-1, where n = 1, 2, 3,...

B. f(n) = 2(5n), where n = 1, 2, 3,...

C. f(n) = 2(5)n-1, where n = 1, 2, 3,...

D. f(n) = 2(5)(n-1), where n = 1, 2, 3,...

Answer 1

C. f(n) = 2(5)n-1, where n = 1, 2, 3,...