1/2<((lnx)/x^(1/2))
    1/2<(lnx)/x^(1/2)
    e(-0.5x^(0.25))<(lnx)/x^(1/2)
    4*x^2 + x >0
    x*1.048＞（1-x）*1.077
    x*1.052＞（1-x）*1.077
    x*1.053＞（1-x）*1.077
    e((lnx/x^(1/8))-0.5(x^0.25))>1+x^(1/8)
    lnx/x^(0.25)>1
    x^2-9x+14＜0
    0＜x2－x－6＜6
    0<100-4x≤25
    2≤33+2-2x≤18
    200*0.07*0.07*0.07/（3*71*1000000000*1/12*0.016*d*d*d） <0.035
    200*0.07*0.07*0.07/（3*71*1000000000*1/12*0.016*d*d*d）<0.035-d/2
    3d<8
    0＜3x^2-2x+1＜1
    1≤3x^2-2x+1＜2
    3x^2-2x＜2
    3x^2-2x＞1

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