Question

State the domain of the rational function
a.All real numbers except 13.
b.All real numbers except -13 and 13.
c.All real numbers except -2 and 2.
d. All real numbers except 2.

Answer 1

It will be all real numbers except those that cause the denominator to equal 0, because then it would be undefined.

so set it equal to 0 and solve

2-x=0
2=x

all real numbers except 2