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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 9x^2+cosx+sqrt(x) >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        9 * x ^ 2 + cos x + sqrt ( x ) >0         (1)
        From the definition field of √
         x ≥ 0        (2 )

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    From inequality(1)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(2)：
         x ≥ 0

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    From inequalities (1) and (2)
         x ≥ 0    (3)

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    The final solution set is :
         x ≥ 0

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