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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 4.9x^2-30x+40 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        4.9 * x ^ 2 - 30 * x + 40 <0         (1)

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    From inequality(1)：
         1.962211 < x < 4.160238

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    The final solution set is :
         1.962211 < x < 4.160238

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