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数学也需要记忆,尤其是在平时.一些成题都是久经考验的好题,熟悉它们,记忆它们,目的是让它们能真正发挥触类旁通的功效.更何况许多高考题都是老题新改,有的甚至连改都没有改.给你提供的以下各题,既考虑了知识点的覆盖面,又考虑了它们的重要意义和实用价值.让我们一起来分析、讨论和记忆以下各题.[例1]已知x<1时,f(x)=x~2+1,如果y=f(x+1)是偶数,则x>1时,f(x)的表达式是
Mathematics also needs to remember, especially in peacetime. Some of the questions are well-tested, familiar, memorable, so that they can really play the role of analogy. Moreover, many college entrance examination questions are old problems , And some even did not change.We will give you the following questions, not only consider the coverage of knowledge points, but also consider their significance and practical value.Let us work together to analyze, discuss and remember the following questions. Example 1 f (x) = x ~ 2 + 1 when x <1 is known, and if y = f (x + 1) is an even number, the expression of f