Question

find the domain of f(x). f(x) = √9x+36​

Answer 1

Answer:

The domain in interval notation is [-4,∝) or set build: {x|x$\geq$

Step-by-step explanation:

I'm assuming the 9x and the 36 are in the root

$\sqrt{9x+36}$

first we must solve for x

${9x+36}\geq 0$

substract 36 to both sides

${9x}\geq -36$

divide by 9 to both sides

$\frac{9x}{9} }\geq \frac{-36}{9}$

simplify left side

$x\geq \frac{-36}{9}$

simplfy right side

$x\geq -4$

The domain in interval notation is [-4,∝) or set build: {x|x$\geq$-4}