Question

The range of the function f(x) = sqrt(x ^ 2 - 1) 1 is
A) [- 1, 1]
B ) (- infty, infty)
C ) [0, infty)
D) (- infty,0]​

Answer 1

Inside the sqrt function domain of the function is selected such that there can't be negative value. Because any square root of negative real numbers are not exist.

And sqrt of any number is generally considered as positive integer.

So, option C is correct.