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5 February, 14:23

For what value of x is the rational expression below undefined? 1-x x+1

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Answers (2)
  1. 5 February, 15:44
    0
    If 1-x/x+1 is undefined then the bottom number must be 0

    set

    x+1=0

    x=-1
  2. 5 February, 17:46
    0
    Hm 1-x=0 and x+1=0 so we need to make them bothe equal zero so we just flip both ones and we should get when 1-x=0, x=1 and when x+1=0, x=-1
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