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Which of these is a proper rational fraction?
A(x^3+1)/(x^2+3)
B(x^2+5)/(x+1)
Cx^4/(x^2-1)
D(x+1)/(x^2+3)
Answer & Solution
Correct answer: D. (x+1)/(x^2+3)
Only the first has a numerator of degree 1, which is lower than the denominator degree 2.
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