【简答题】解不等式. (1) x+1 x-2 ≤3 (2)x 2 -2ax-3a 2 <0(a<0)
【单选题】49This morning Microsoft CEO Satya Nadella published a report on his _____ for the company's future.
【单选题】不等式ax 2 ﹣bx+c>0的解集为{x|﹣1<x<2},那么不等式a(x 2 +1)+b(x﹣1)+c>2ax的解集为 [ ]
【单选题】女,28岁,已婚未孕,进行性痛经。妇科检查:宫颈糜烂Ⅰ度,子宫正常大小,后倾,活动欠佳,附件增厚压痛,直肠子宫凹陷触及2个结节,最可能的诊断是()。
【简答题】若不等式x 2 -ax+b<0的解集是{x|2<x<3},求不等式bx 2 -ax+1>0的解集.
【简答题】(1)解关于x的不等式ax 2 -(a+1)x+1<0. (2)若对于a∈[2,3],不等式ax 2 -(a+1)x+1<0恒成立,求x的取值范围.
【简答题】解下列关于x的不等式(组): (1) a 2 x+b> b 2 x+ab ; (2)|2x-1|≤3; (3)|x-4|-|2x-3|≤1; (4)|ax-1|>ax-1; (5) x>a+1 x<2a-1
【简答题】已知不等式ax 2 -3ax+6>0的解集为{x|x<1或x>b} (1)求a,b的值; (2)解不等式:ax 2 -(2a+b)x+2b<0.
【多选题】Listen to the recording and check the points you have just heard. [音频]
A.
Denmark is one of the happiest countries in the world.
B.
Most Danish people work part time.
C.
Most Danish people pay high taxes.
D.
Most Danish people enjoy the long winters.
E.
Most Danish people spend a lot on healthcare.