→ dukechiang:support B +1 08/27 13:31
DS
9、p(x)和q(x)是quadratic function,for each real number x the function,
p(x)/q(x), is also a real number?
(1) p (2)=0, p(3)=0
(2) q (0)=0, q(1)=0
機經主人解答C.
但為何B獨立不對？
問是否為real number, 所以只要判斷q(x)是否為0
條件2, x=0 or 1時, q(x)=0 --> p(x)/q(x)必為 non-real number --SUF
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