Question

What is the range of f(x)=e^x?

A.All real numbers less than 0
B.All real numbers except 0
C.All real numbers
D.All real numbers greater than 0

Answer 1

D. All real numbers greater than 0

Answer 2

The range refers to the value of y for which x is define.

So let y=f(x),


`y = {e}^(x)`

Try making x the subject to obtain,


`x = ln(y)`
x is defined for all real values of y greater than
0.

Hence the correct answer is D.