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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1.25^x+0.8^x+0.8^x >= 3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1.25 ^ x + 0.8 ^ x + 0.8 ^ x >= 3         (1)

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    From inequality(1)：
         x ≤ 0 或  x ≥ 3.106284

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    The final solution set is :
         x ≤ 0 或  x ≥ 3.106284

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