若x<y,且(m-2)x>(m-2)y,则m的取值范围是______.
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若x<y,且(m-2)x>(m-2)y,则m的取值范围是______. |
答案
∵若x<y,且(m-2)x>(m-2)y,∴m-2<0,则m<2; 故答案为m<2. |
举一反三
若实数a、b、c满足a2+b2+c2=9,那么代数式(a-b)2+(b-c)2+(c-a)2的最大值是______. |
如果b<a<0,则下列结论中正确的是( )A.b2<ab | B.b2>ab>a2 | C.b2<a2 | D.b2>a2>ab |
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The number of integer solutions for the syetem of inequalities about x is just 6,then the range of value for real number a is( ) (integersolutions整数解;syetem of inequalities不等式组;the range of value取值范围)A.-2.5<a≤-2 | B.-2.5≤a≤-2 | C.-5<a≤-4 | D.-5≤a≤-4 |
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