The range of f(x) = a^x , where a > 0 is

Question

Mark (√) against the correct answer in the following: 

The range of f(x) = a^x , where a > 0 is 

A. [ - ∞, 0] 

B. [ - ∞, 0) 

C. [0, ∞) 

D. (0, ∞)

Answer 1

Correct Answer is (D) (0, ∞)

f(x) = a^x 

when x < 0 

0 <  a^x < 1

When x ≥ 0

a^x > 0

Therefore range of f(x) = a^x = (0, ∞)