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数学中常常会有些隐含在题目中的条件,这些隐含条件往往是解决问题的关键,却容易被忽视而感觉无从下手或造成错解.下面的这些题目中隐含着相同的条件:二次根式的被开方数≥0.以下举例说明如何利用这样的隐含的条件来解决问题.
There are often implicit conditions in mathematics, these implicit conditions are often the key to solve the problem, but can easily be ignored and feel unable to start or cause misunderstanding.The following topics imply the same conditions: The number of rooted roots is greater than or equal to 0. The following example shows how to use such implied conditions to solve the problem.