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

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

A rational+expression 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 undefined+if the denominator is equal to 0.

so, rational+expression 1%2F%28z-1%29 is undefined if z-1=0 or z=1.