Question

What is the range of the function f(x) = 3x − 12 for the domain {-2, 2}?

Answer 1

`f(x)=3x-12`


`\text{the domain}\ x\in\{-2;\ 2\}`


`\text{the range:}\\\\f(-2)=3\cdot(-2)-12=-6-12=-18\\f(2)=3\cdot2-12=6-12=-6\\\\\boxed{\{-18;\ -6\}}`