Question 180242
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A rational expression is undefined whenever the denominator equals zero.  You need to exclude any value for <i>z</i> that would make the denominator zero.  So, solve the following for <i>z</i>:


*[tex \Large \text {          }\math 6z + 7 = 0]


And the result will be the value that must be restricted.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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