Question

Find the domain of the following expression:
1/(√x)-2

Answer 1

The domain of this function is going to be all of the real POSITIVE numbers EXCEPT when the denominator equals 0, because you can't divide by 0, therefore:

(√x) - 2 = 0

(√x) = 2

x = 2^2

x = 4

Therefore, the domain is all of POSITIVE real numbers EXCEPT 4