Determine the solution to f(x) = g(x) using the following system of equations:
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Ration expressions cause excluded values wherever the denominator equals zero.
So, for any expression like
-5 is an excluded value if
For example, the simplest one would be
In fact, if you try to evaluate this function at -5, you'd have
which is undefined, and thus you can't evaluate the function, and thus -5 is an excluded value.