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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (x+1)^2(x-7)^3(x+4)(x-5)^4 >= 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( x + 1 ) ^ 2 * ( x - 7 ) ^ 3 * ( x + 4 ) * ( x - 5 ) ^ 4 >= 0         (1)

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    From inequality(1)：
         x ≤ -4 或  x ≥ 7

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    The final solution set is :
         x ≤ -4 或  x ≥ 7

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