Chapter 2 - 2.2 - Functions - 2.2 Exercises - Page 183: 55

(0, ∞ )

f(x) = (x-4)/$\sqrt x$ Eliminate values of x that make denominator zero, that is, x=0 Also x $\geq$ 0 as the value under the square root should be non-negative. Hence $x \geq 0$, Hence combining both the constraints we get x > 0.