1个回答
展开全部
(1)x(x-1/2)>0
根据题意:f(x(x-1/2))<f(1)
x(x-1/2)<1.............(1)
x(x-1/2)>0............(2)
由(2),解得
x>1/2 ...........(3)
或 x<0...........(4)
由(1),解:
2x²-x-2<0
(1-√17)/4<x<(1+√17)/4..........(5)
由(3)(4)(5),得
x∈{(1-√17)/4<x<0 }∪ {1/2<x<(1+√17)/4}
(2)x(x-1/2)<0
根据题意:f(-x(x-1/2))<f(1)
-x(x-1/2)<1.............(1)
-x(x-1/2)>0............(2)
由(2),解得
0<x<1/2 ...........(3)
由(1),解:
2x²-x+2>0
Δ<0
故 x∈{ 0<x<1/2}
根据题意:f(x(x-1/2))<f(1)
x(x-1/2)<1.............(1)
x(x-1/2)>0............(2)
由(2),解得
x>1/2 ...........(3)
或 x<0...........(4)
由(1),解:
2x²-x-2<0
(1-√17)/4<x<(1+√17)/4..........(5)
由(3)(4)(5),得
x∈{(1-√17)/4<x<0 }∪ {1/2<x<(1+√17)/4}
(2)x(x-1/2)<0
根据题意:f(-x(x-1/2))<f(1)
-x(x-1/2)<1.............(1)
-x(x-1/2)>0............(2)
由(2),解得
0<x<1/2 ...........(3)
由(1),解:
2x²-x+2>0
Δ<0
故 x∈{ 0<x<1/2}
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询