已知不等式x-2a+b<0,2x+3a-5b>0的解集为-1
人气:429 ℃ 时间:2020-03-24 01:06:16
解答
x-2a+b<0,2x+3a-5b>0
则x<2a-b,x>(-3a+5b)/2
则(-3a+5b)/2因为解集为-1所以(-3a+5b)/2=-1
2a-b=6
则-3a+5b=-2①
2a-b=6②
①+②,得-a+4b=4
则a-4b=-4
推荐
猜你喜欢
- he comes from Shanghai.对划线部分(Shanghai)提问
- (化学选择)下列物质一定是纯净物的是
- Please send Proforma as soon as possible.
- Wouid you like some more noodles?
- Three years ago,Cathy---(更喜欢)reading English novels.
- 五加五加十五等于多少
- but表转折,前后句的时态是否一样
- 1,to,for,something,going,are,party,special,make,we,the 2,a,his,visit,tourist,with,to,the,planning,