Question

Find the domain of the function.
g(x) = 3x / x^2 - 81

A. (-∞, ∞)
B. (-∞, -9)u (-9, 9)u (9, ∞)
C. (81, ∞)

Answer 1

Factor the denominator.
Remember that the denominator cannot be zero.

Answer 2

All real numbers, where x does not equal 9 or -9

Answer 3

so a?

Answer 4

well lets say it goes negative infinity to but not including -9, then from -9 to but not including 9 then on to infinity.

Answer 5

b

Answer 6

You tell me, i think you kno.