1/X≥1/3
    x-√(x^2-4)≤0
    x+√(x^2-4)≤0
    (2x-1)＜1÷64
    x≥√(x^2-4)
    (2x-1)＜1÷64
    (2x-1)^(-1÷2)＜8
    3x^2+4x-4＞0
    x^2-2x-3＞0
    a×2>2.4
    (X+2)(X- 3)＞0
    x－1/2－x＞1
    x－1/2－x＞1
    (2x-7)(2x-7)>=(4x+5)(4x+5)
    (2x-5)(2x-5)>=(4x+7)(4x+7)
    C(100,n)*0.01^n*0.99^(99-n)+0.99^99>1
    -x^2-2x-1小于0
    -1<-2x^3+3x^2<1
    2a-4>0 3-a>0
    30xxxx-100xxx+144x-16>0

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