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For which rational expression is -5 an excluded value of x?

2 Answers

4 votes

Ration expressions cause excluded values wherever the denominator equals zero.

So, for any expression like


h(x)=(f(x))/(g(x))

-5 is an excluded value if
g(-5)=0

For example, the simplest one would be


h(x) = (1)/(x+5)

In fact, if you try to evaluate this function at -5, you'd have


h(-5)=(1)/(5+5)=(1)/(0)

which is undefined, and thus you can't evaluate the function, and thus -5 is an excluded value.

User AlexUA
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7.1k points
4 votes

Answer:

6/x+5

Explanation:

User David Locke
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6.5k points