Question

what is the domain and range of 3^x-3

Answer 1

domain all real range 0 to inf

Answer 2

if x =0, the function value will be -3.
when x tends to positive infinity, the value will getting bigger even you minus with three, it's still big.
but when x tends to negative infinity, the function value of 3^x will tend to 0.

i guess the range lies between -3 to positive infinity :)