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函数奇偶性技巧使用的基本思想是对已知的数学公式进行定向变形,通过升级函数找出已知量与未知量之间的联系,从而使数学公式由繁入简.一、利用函数的奇偶性求函数值函数的求值问题常常出现的考试中,而这一类型的题目解答方式则是全面分析已知条件中包含的变量,并通过题目给出的条件组合函数公式,再利用函数的奇偶性来解答题目.例1已知(x+2y)5+x5+2x+2y=0,求解(x+y)1998
The basic idea of the function of the use of parity techniques is the known mathematical formula for directional deformation, through the upgrade function to find out the relationship between the known amount and the unknown amount, so that the mathematical formula by the simple into. First, the use of function parity The function of the value of the function evaluation of the problem often appear in the exam, and this type of problem solving is a comprehensive analysis of the known conditions of the variables included, and by the conditions given by the combination of function formulas, and then use the function Parity to solve the problem Example 1 Known (x + 2y) 5 + x5 + 2x + 2y = 0, solving (x + y) 1998