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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.9801*t^4-1.993831*t^2-0.0199 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        0.9801 * t ^ 4 - 1.993831 * t ^ 2 - 0.0199 <0         (1)

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    From inequality(1)：
         -1.429771 < t < 1.429771

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    The final solution set is :
         -1.429771 < t < 1.429771

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