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OpenStudy (anonymous):
which rational expression deos not have any undefined values? A. 3x-2/x^2+1 B. x^2-9/4x+1 C. 6x/2x^2-3x D. 7x^2/4-x
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OpenStudy (harsimran_hs4):
the denominator should not be zero if you carefully observe x^2 + 1 can have minimum value as 1 (think why?) so it`s always defined
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