53. In the store of a car dealer, less than 10 cars are equipped with fog light, and 40% of the cars have **window, Is the dealer has more car with fog light than those with **window? (1)80% cars have fog light and window (2)52 cars have fog light or window or both 答案不知道?? **我算(B) 60. r 和 t是小於等於4的正整數，問r的-t次方最小是好多？ JJ答案: 1/rt結果為最小? 就相當rt於最大是多少…1/81 0<R=<4, 0<t=<4 1/(4)^4=1/64 我算不同答案??1/64 65. x3y^2z>0? (1)xz<0 (2)y>0 JJ答案: 第一個單獨可以，小於零；第二個完全不可以..(A) 關鍵只要X為正即可~ 我算不同~ (1)x3y*2z=X為正時, Z為負,總結果為正~ X為負時, Z為正,總結果為負~不成立~ (2)不知道Z跟Z條件,不成立~ (3) 還是無唯一解~ 選(E) --

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