## anonymous 5 years ago Whoever is good at precalc pleaseee help!!!! find the domain of the function: f(x)=√2-x the square root is over the x too

1. watchmath

Since the square root only non-negative inputs, then we need $$2-x\geq 0$$ i.e., $$x\leq 2$$

2. watchmath

only accepts non-negative inputs

3. anonymous

want to see the choices?

4. watchmath

In interval notation that is equicalent to $$(-\infty,2]$$.

5. anonymous

thanks you

6. anonymous

for the given functions f(x)=8x=5, g(x)=4x-1, find the compostion (fog)(x) the o btw the f and g is supposed to be a little of i think meaning of