作者krisis (fhoa f)
看板GMAT
標題[計量] 二題ds，抱歉沒有題號
時間Wed Nov 12 06:43:40 2008
what is the value of XY?
(1)Y=X +1
(2)Y=X^2 +1
ANS:E
我是選c，我算到 x=x^2 我就覺得算得出來~~
If Y is an integer and Y=|X|+X, is Y=0 ?
(1)X<0
(2)Y<1
ANS:D
我選a而以~
b我算不出來~
謝謝
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1F：推 reznor:(1) x=x^2 => x = 0 or 1 11/12 06:53
2F：推 reznor:(2) when x < 0 => y = 0 (a) get 11/12 06:55
3F：→ reznor: when x >= 0 => y = 2x & y >= 0, given y < 1 and is 11/12 06:57
4F：→ reznor: integer, y = 0. 11/12 06:58
5F：推 dividi:ds除了要算的出來以外 答案要是唯一解 c的話有兩解故選e 11/12 10:10
6F：→ krisis:謝謝~了解了~ 11/12 10:29