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find all numbers for which the rational expression is undefinded

8/8z+7

I think the expression is undefined for all real numbers

  • help -

    If the fraction is 8/(8z) + 7 you are right.

    If it is 8/(8z+7) then the answer is different.

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    Oops. If 8/(8z) + 7, then it is undefined only for z=0

    In general, a rational expression is undefined where the denominator is zero.

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    Thank you steve

  • help -

    My pleasure. Now, go forth and solve similar problems with confidence!

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    I will try my best

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