The democracy itself needs a literate citizen rate in order to keep it in check.

为了保持国家的持续进步,一个民主国家需要更多的高文化素养的公民。

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I actually need to check the second order condition.

实际上我们还需要验证二阶条件

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So how do I check the second order condition?

怎样验证二阶条件呢

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I differentiate a second time and check the sign, so the second order condition, I differentiate this expression again with respect to q1.

我们对它进行二次求导然后看符号,这个式子的二阶导数,就是一阶导数再对q1进行求导

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