Question 1021916
Division by zero is the issue with these and excludes values of x since it's undefined.
{{{y=-1/x}}}
{{{x<>0}}}
.
.
{{{y=3/(x+5)}}}
{{{x+5<>0}}}
{{{x<>-5}}}
.
.
You can do the last one the same way.
Solve for when the denominator equals zero.
Then exclude that value of x.