Question

Let f be a function such that `f(x)=2x-4` is defined by the domain `2<=x<=6`, what is the range of this function?

Answer 1

Range: `f(x) in [0,8]`

Explanation:

Since `f(x)=2x-4` is linear, its limit values correspond to the limits imposed by the domain (in this case `x in [2,6]`)

`f(x)=2 * 2-4=0`
`f(6)=2 * 6 -4 =8`