3^2+2x-1≥0
    3^2+2x-1>0
    17-3.5/(1+X)>(2+2+1.5+2+2+1.5+1.5+1.5+1.5+2)/(1+X)
    17-3.5/(1+X)>(2+2+1.5+2+2+1.5+2+1.5+1.5+2)/(1+X)
    17-3.5/(1+X)>(2+2+1.5+2+2+1.5+2+1.5+2+2+1.5+2+2)/(1+X)
    17-3.5/(1+x)>(2+2+1.5+2+2+2+1.5+1.5+1.5+2+2)/(1+x)
    17-3.5/(1+x)>(2+2+1.5+2+2+2+1.5+1.5+1.5+2)/(1+x)
    17-3.5/(1+x)>(2+2+1.5+2+2+2+1.5+1.5+1.5+1.5+2)/(1+x)
    17-3.5/(1+x)>(2+2+1.5+2+2+2+1.5+2+2+1.5+1.5)/(1+x)
    17-3.5/(1+x)>(2+2+1.5+2+2+2+1.5+2+2+1+1.5)/(1+x)
    17-3.5/(1+x)>(2+2+1.5+2+2+2+1.5+2+2+2+1.5)/(1+x)
    17-3.5/(1+x)>(2+2+1.5+2+2+2+1.5+2+2)/(1+x)
    (x-1)/x<0
    9k^2+8k+4>0
    4x-2（3x-2)<16
    40x>x^2
    40x>x2
    (10+x)(500-10x)>500
    3+2x-x^2≥0
    abs(3x-2)>1

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