This precalculus tutorial covers 6 basic examples of finding the domain of a function in interval notation. We will just focus on rational functions and square root functions. Remember, when we have top/bottom, the bottom cannot be 0. When we have sqrt(inside), then inside has to be greater or equal to 0.
0:00 ex1 f(x)=(2x-1)/(3x+5)
2:41 ex2 f(x)=(x-2)/(x^2-4x+3)
4:18 ex3 f(x)=(x-5)/(x^2+4)
5:36 ex4 f(x)=3+sqrt(x+2)
7:15 ex5 f(x)=3/x+sqrt(x+2)
9:12 ex6 f(x)=sqrt(6-2x)/(2x+1)
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