Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.85^l+0.15*l*0.85^(l-1)+l*(l-1)/2*0.15^2*0.85^(l-2)+l*(l-1)*(l-2)/6*0.15^3*0.85^(l-3)+l*(l-1)*(l-2)*(l-3)/24*0.15^4*0.85^(l-4) <0.3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        0.85 ^ l + 0.15 * l * 0.85 ^ ( l - 1 ) + l * ( l - 1 ) / 2 * 0.15 ^ 2 * 0.85 ^ ( l - 2 ) + l * ( l - 1 ) * ( l - 2 ) / 6 * 0.15 ^ 3 * 0.85 ^ ( l - 3 ) + l * ( l - 1 ) * ( l - 2 ) * ( l - 3 ) / 24 * 0.15 ^ 4 * 0.85 ^ ( l - 4 ) <0.3         (1)

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    From inequality(1)：
         l ＞ 38.298806

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    The final solution set is :
         l ＞ 38.298806

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