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已知不等式ax2+bx+c>0的解集为{x|2<x<4},则不等式cx2+bx+a<0的解集为 

发布时间:2021-07-20

A.{x|x>http://picflow.koolearn.com/upload/papers/g02/20120923/20120923152018076558.png}

B.{x|xhttp://picflow.koolearn.com/upload/papers/g02/20120923/20120923152018204813.png}

C.{x|http://picflow.koolearn.com/upload/papers/g02/20120923/20120923152018331554.pnghttp://picflow.koolearn.com/upload/papers/g02/20120923/201209231520184601285.png}

D.{x|xhttp://picflow.koolearn.com/upload/papers/g02/20120923/20120923152018607808.pnghttp://picflow.koolearn.com/upload/papers/g02/20120923/201209231520187351382.png}

试卷相关题目

  • 1在R上定义运算http://picflow.koolearn.com/upload/papers/g02/20111110/20111110143734343864.gif:xhttp://picflow.koolearn.com/upload/papers/g02/20111110/20111110143734343864.gify=x(1-y),若不等式(x-a)http://picflow.koolearn.com/upload/papers/g02/20111110/20111110143734359864.gif(x+a)<1对任意实数x成立,则

    A.-1<a<1

    B.0<a<2

    C.http://picflow.koolearn.com/upload/papers/g02/20111110/201111101437343901010.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20111110/201111101437344211010.gif

    开始考试点击查看答案
  • 2在R上定义运算⊙:a⊙b=ab+2a+b,则满足x⊙(x-2)<0的实数x的取值范围为

    A.(0,2)

    B.(-2,1)

    C.http://picflow.koolearn.com/upload/papers/g02/20111124/201111241409579531054.gif

    D.(-1,2)

    开始考试点击查看答案
  • 3关于x的不等式x2+px-2<0的解集是(q,1),则p+q的值为 

    A.-2

    B.-1

    C.1

    D.2

    开始考试点击查看答案
  • 4下列续集中正确的个数是 ①命题“存在x∈R,x2﹣x>0”的否定是“任意x∈R,x2﹣x>0”; ②命题“若am2<bm2,则a<b”的逆命题是真命题; ③若¬p是q的必要条件,则p是¬q的充分条件; ④任意x∈R,不等式x2+2x>4x﹣3均成立.

    A.1个

    B.2个

    C.3个

    D.4个

    开始考试点击查看答案
  • 5二次不等式ax2+bx+c>0的解集是全体实数的条件是(  )

    A.a>0△>0

    B.a>0△<0

    C.a<0△>0

    D.a<0△<0

    开始考试点击查看答案
  • 6当|m|≤1时,不等式﹣2x+1<m(x2﹣1)恒成立,则x的取值范围是

    A.(﹣1,3)

    B.(0,﹣1+http://picflow.koolearn.com/upload/papers/g02/20120821/20120821113517083736.png

    C.(﹣3,1)

    D.(﹣1+http://picflow.koolearn.com/upload/papers/g02/20120821/20120821113517142736.png,2)

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  • 7不等式-x2+4x-4>0的解集是

    A.R

    B.image.png

    C.(0,+∞)

    D.(-∞,0)

    开始考试点击查看答案
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