Question 370104
THe domain is all x values for which the function is defined.
The function is undefined when the denominator equals zero since division by zero is undefined.
{{{x^2-49=0}}}
{{{x=0 +- 7}}}
So the domain is all x except {{{x=7}}} and {{{x=-7}}}
In interval notation,
({{{-infinity}}},{{{-7}}}) U ({{{-7}}},{{{7}}}) U ({{{7}}},{{{infinity}}})