作者pilichat (人生需要不断冒险)
看板GMAT
标题[计量] 八月jj -9
时间Thu Aug 27 13:05:12 2009
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
机经主人解答C.
但为何B独立不对？
问是否为real number, 所以只要判断q(x)是否为0
条件2, x=0 or 1时, q(x)=0 --> p(x)/q(x)必为 non-real number --SUF
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