Question

Which expression is equivalent to the one below? 5^x

Answers (multiple choice)
A. 5*5^(x-1)
B. 15^x/3
C. 15^x/3^x
D. (15/3)^x
E. 5*5^(x+1)
F. x^5

Answer 1

A, B and D.

Explanation:

A: because 5* 5^(x-1) = 5^(x - 1 + 1) = 5^x.

B. 15^x / 3 = 5^x

D. (15/3)^x = 5^x.

( Note C = 5 , E = 5^(x+2) and x^5 not = 5^x.)