太湖中学2014届高三上学期期中考试数学(理)
试题一. 选择题(每小题5分,共50分) 1. 设集合a={x|1<x<4},集合b ={x| -2x-3≤0}, 则a∩(crb)= a .(1,4) b .(3,4) c.(1,3) d .(1,2)∪(3,4) 2. 已知命题p: x1,x2 r,(f(x2) f(x1))(x2 x1)≥0,则 p是 (a) x1,x2 r,(f(x2) f(x1))(x2 x1)≤0 (b) x1,x2 r,(f(x2) f(x1))(x2 x1)≤0 (c) x1,x2 r,(f(x2) f(x1))(x2 x1)<0