SOLUTION: What value of x will make the rational function -x/x+1 undefined? Please help me answer this question!

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Question 810844: What value of x will make the rational function -x/x+1 undefined?
Please help me answer this question!
Answer by Alan3354(69443) About Me  (Show Source):
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What value of x will make the rational function -x/x+1 undefined?
Please help me answer this question!
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It's the value that makes the denominator zero.