Overview: 3 questions will be solved this time.Among them
           ☆3 inequalities

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

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    From inequality(1)：
         x < -1 或  x ＞ 3

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    The final solution set is :
         x < -1 或  x ＞ 3
[ 2/3Inequality]
    Assignment:Find the solution set of inequality x+2 >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x + 2 >0         (1)

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    From inequality(1)：
         x ＞ -2

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

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    From inequality(1)：
         x < -0.618034 或  x ＞ 1.618034

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    The final solution set is :
         x < -0.618034 或  x ＞ 1.618034

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