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设一元二次不等式ax2+bx+1>0的解集为{x|-1≤x≤http://picflow.koolearn.com/upload/papers/g02/20110812/20110812110643406875.gif},则ab的值是

发布时间:2021-07-20

A.-6

B.-5

C.6

D.5

试卷相关题目

  • 1下列不等式中,与|x-2|<3的解集相同的是

    A.x2-4x-5<0

    B.http://picflow.koolearn.com/upload/papers/g02/20110427/20110427140954312995.gif

    C.(5-x)(x+1)<0

    D.x2+4x-5<0

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  • 2定义运算http://picflow.koolearn.com/upload/papers/g02/20110524/20110524094854921902.gif:xhttp://picflow.koolearn.com/upload/papers/g02/20110524/20110524094854937902.gify=x(1-y),若不等式(x-a)http://picflow.koolearn.com/upload/papers/g02/20111017/20111017093710001.gif(x+a)<1对任意实数x 成立,则实数a的取值范围是

    A.-1

    B.0

    C.-http://picflow.koolearn.com/upload/papers/g02/20110524/20110524094854953933.gif

    D.-http://picflow.koolearn.com/upload/papers/g02/20110524/20110524094855000923.gif

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  • 3不等式http://picflow.koolearn.com/upload/papers/g02/20110827/20110827095807250921.gif(x-1)(x-2)2(x-3)<0的解集是

    A.(-1,1)∪(2,3)

    B.(-∞,-1)∪(1,2)∪(2,3)

    C.(-∞,-1)∪(1,3)

    D.{x|x<-3或x>2}

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  • 4若存在实数a∈[1,3],使得不等式ax2+(a-2)x-2>0成立,则实数x的取值范围是

    A.(-∞,-1)∪(2,+∞)

    B.[-1,http://picflow.koolearn.com/upload/papers/g02/20110815/20110815110431703881.gif]

    C.(-∞,-1)∪(http://picflow.koolearn.com/upload/papers/g02/20110815/20110815110431703881.gif,+∞)

    D.(-1,2)

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  • 5若不等式http://picflow.koolearn.com/upload/papers/g02/20110812/20110812164141984885.gifx2+qx+p>0的解集为{x|2<x<4},则实数p与q的值分别是

    A.http://picflow.koolearn.com/upload/papers/g02/20110812/201108121641420001274.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20110812/201108121641420001283.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20110812/201108121641420151236.gifhttp://picflow.koolearn.com/upload/papers/g02/20110812/201108121641420151283.gif

    D.以上答案都不对

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  • 6不等式(x-1)(2-x)<0的解集为

    A.{x|x<1或x>2}

    B.{x|-2<x<1}

    C.{x|x<-2或x>1}

    D.{x|1<x<2}

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  • 7不等式4x2-4x+1≤0的解集是

    A.{http://picflow.koolearn.com/upload/papers/g02/20110523/20110523172353037879.gif}

    B.(-∞,http://picflow.koolearn.com/upload/papers/g02/20110523/20110523172353053879.gif)∪(http://picflow.koolearn.com/upload/papers/g02/20110523/20110523172353053879.gif,+∞)

    C.R

    D.http://picflow.koolearn.com/upload/papers/g02/20110523/20110523172353100858.gif

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  • 8函数f(x)=http://picflow.koolearn.com/upload/papers/g02/20110827/201108271104125781075.gif的定义域为R,则实数m的取值范围是

    A.(-∞,http://picflow.koolearn.com/upload/papers/g02/20110827/20110827110412593882.gif

    B.[0,http://picflow.koolearn.com/upload/papers/g02/20110827/20110827110412609882.gif

    C.(http://picflow.koolearn.com/upload/papers/g02/20110827/20110827110412671882.gif,+∞)

    D.(-http://picflow.koolearn.com/upload/papers/g02/20110827/20110827110412687882.gifhttp://picflow.koolearn.com/upload/papers/g02/20110827/20110827110412703882.gif

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  • 9若对一切x∈[http://picflow.koolearn.com/upload/papers/g02/20110829/20110829144318718879.gif,2]使得ax2-2x+2>0都成立,则a的取值范围为

    A.a≥http://picflow.koolearn.com/upload/papers/g02/20110829/20110829144318734879.gif

    B.a>http://picflow.koolearn.com/upload/papers/g02/20110829/20110829144318796879.gif

    C.a≥-4

    D.a>4

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  • 10不等式ax2+5x+c>0的解集为{x|http://picflow.koolearn.com/upload/papers/g02/20110827/20110827094701937873.gif<x<http://picflow.koolearn.com/upload/papers/g02/20110827/20110827094701953879.gif},则a、c值为

    A.a=6,c=1

    B.a=-6,c=-1

    C.a=1,c=1

    D.a=-1,c=-6

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