SOLUTION: Find all numbers for which the rational expression is undefined. 1/z-1

Question 476980: Find all numbers for which the rational expression is undefined.
1/z-1
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

A is a quotient of two expressions. A rational expression can also be considered as a division; when simplifying a single rational expression, divide the numerator by the denominator.
For any rational number or rational expression, the number or expression is the is to .

so,

is if or .
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