Question

how do i find the domain and range of a function?

Answer 1

Domain is the x value and the range is the y value.

Answer 2

so how do i answer it if the function reads F(X)=2/x^2-2x-3?
do i write (for range) all real numbers except for +3?

Answer 3

First you write the equation as this f(x) = 2 / (x²−2x−3) ,
f(x) = 2 / ((x+1)(x−3))

Answer 4

Domain:

(x+1) (x−3) ≠ 0
x ≠ −1 and x ≠ 3

(−∞, −1) U (−1, 3) U (3, ∞)