Find the domain of

f left parenthesis x right parenthesis equals 4 times 2 Superscript xf(x)=4•2x.

Choose the correct answer below and, if necessary, fill in the answer box to complete your choice.

A.

StartSet x|x less than nothing EndSetx|x<

B.

StartSet x|x not equals nothing EndSetx|x≠

(Use a comma to separate answers as needed.)

C.

StartSet x|x equals nothing EndSetx|x=

(Use a comma to separate answers as needed.)

D.

StartSet x|x greater than nothing EndSetx|x>

E.

All real numbers