Question

find the domain and range of f(x)=4/√8-x​

Answer 1

your expression:

$f(x)=\frac{4}{\sqrt[]{8-x} }$

Steps:

For f(x) to be definable,

$\sqrt{8-x} \neq 0\\8-x\neq 0\\x\neq 8$

Thus, Range of f(x) = R-8.

Domain also is R-8.