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标题: GWD 18-9 [打印本页]

作者: knight9514    时间: 2005-11-13 07:17     标题: GWD 18-9

Q9:

Is x < 0 ?

(1) x3 < x2

(2) x3 < x4

ANS : C


作者: mindfrees    时间: 2005-11-13 19:43

1. x^2(x-1)<0 => x<1 && x<>0 insufficient

2. x^3(1-x)<0 => x<0 || x>1 insufficient

1&2: x<0 DONE!


作者: knight9514    时间: 2005-11-15 20:52

i  see  !!thanks  !!!!




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