Question

Find the domain of the function.

x / sqrt(x - 5)

I know it uses the less than sign but I don't understand if its less than or less than or equal to.

a. x >= 5
b. x != 5
c. all real numbers
d. x > 5

Answer 1

a answer

Answer 2

a isn't the answer.

Answer 3

why

Answer 4

You need to make sure that the number on the bottom is a real number (assuming you don't want to divide by a complex number, which occurs when taking square root of a negative number).

So you need x-5 to be positive, and not zero.

Answer 5

ok d will b answer

Answer 6

x-5 will not b 0