Question

I dont understand this

Answer 1

`x\geq 2`

Explanation:

we have

`y=√(2x-4)`

we know that

The radicand must be greater than or equal to zero

so

`2x-4\geq 0`

Solve for x

Adds 4 both sides

`2x-4+4\geq 0+4`

`2x\geq 4`

Divide by 2 both sides

`x\geq 2`

so

The domain is the interval for x ----> [2,∞)

All real numbers greater than or equal to 2