# Find Where Undefined/Discontinuous (x-4)/(4+x)

Set the denominator in equal to to find where the expression is undefined.
Subtract from both sides of the equation.
The equation is undefined where the denominator equals , the argument of a square root is less than , or the argument of a logarithm is less than or equal to .
Find Where Undefined/Discontinuous (x-4)/(4+x)

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