1.96*0.4*sqrt(1/(x-1))+1/(2*x)<=0.01
    e^x+x^2+2x<0
    x²+6x+10＞0
    -2x²+3x-4＜0
    x²-2√5x+√5＞0
    x²-2√5+√5＞0
    2x＾2+3x<0
    2x＾2-3x<0
    2x(x-1/2)小于1
    -x＾2+2x+3>=0
    x＾2-x+1>=0
    x＾2-x+1<=0
    1/36≥k²
    1/36≤k²
    1/4≤k²
    (-2-p-sqrt((2+p)＾2-4)/2<=0
    (-2-p+sqrt((2+p)＾2-4)/2<0
    (2+p)＾2-4<0
    （x^2-x）（x+2）＞（x^3-x）^2
    x（6x+5）＜4

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