2x^2-5x-3＜0
    k*(0.95^k)<1
    k*(0.9^k)<1
    k*0.9^k<1
    k0.9^k<1
    k0.75^k<1
    k0.7^k<1
    k0.7^k>1
    x >= sqrt(925.2/e*3.14159*1.56*29.965*x^0.15)-336.1/1.56*x^0.15
    x>= sqrt(925.2/e*3.14159*1.56*29.965*x^0.15)-336.1/1.56x^0.15
    k*0.95^k>1
    （0.9963k-0.0009）0.70^k>0.9991-0.0036k
    （0.9963k-0.0009）0.75^k>0.9991-0.0036k
    （0.9963k-0.0009）0.80^k>0.9991-0.0036k
    （0.9963k-0.0009）0.85^k>0.9991-0.0036k
    （0.9963k-0.0009）0.90^k>0.9991-0.0036k
    （0.9963k-0.0009）0.95^k>0.9991-0.0036k
    3/x+1＞13/12
    x^2－16x+128>0
    x2－16x+128>0

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