Question

What is the domain and range of `y =sqrt(x^2-1)`?

Answer 1

the domain is
`x in RR, but x^2-1>=0`
And the range is
`(0,oo)`

Explanation:

Real numbers exist in `sqrt` shouldn't be negative ,therefore I wrote this pattern `x^2-1>=0`
And the domain is `x in RR, but x^2-1>=0`
And the range is `(0,oo)`