Ch. 4 Section 1

Fraction: Fractions do not have a range... <- Remember this

Domain is found through factoring the top/bottom, then canceling if at all possible, set x= # that is canceled on the side, then set the bottom equal to zero and then solve for x, then write your answer in interval notation stopping at the numbers found in steps two and three.

Example.)  x^2 + 1 / (x-1) (x+2), Factor/Cancel: (x+1)(x-1) / (x-1) (x+2),             x=1
x+2 = 0                                                                                                                     x=2
Domain: (-infinity,1)u(1,2)u(2,-infinity)

- Parrish Masters