Answer:
f(x) is undefined where Q=0 or R=0.
Step-by-step explanation:
The function f(x) will be undefined if any of the denominators is zero. That will be the case for Q=0 and for R=0. (You can find some of the excluded values by examining g(x) = P/R.)
To find the excluded values, find the zeros of the denominator polynomials.
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By itself, examining g(x) may not tell you all of the excluded values of the domain of f(x). The zeros of Q also need to be excluded.
