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若能注意发掘题中的隐含条件,可以使求解变得轻松.下面列举五例.例1已知实数a满足|a-2007 |+ (a-2008)~(1/2)=a,那么,a-2007~2=__.分析由二次根式的定义,应当有
If you can pay attention to the hidden conditions in the excavation problem, you can make the solution easy. Here are five examples. Example 1 Known real number a satisfies |a-2007 |+ (a-2008)~(1/2)=a, Then, a-2007~2=__. The analysis is defined by the secondary root formula. There should be