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常量代换是指利用某些带有常数项的恒等式,把常量用变量来代换或把变量化为常量;或者用常量的不同表达式替换;或者直接用变量代替常量,从而使得所求解的问题得以转化,实现化难为易、化繁为简,最终解决问题。这种方法在恒等变形、代数式或三角式求值,解方程(组),求极值以及不等式的求解或证明等问题都有一定的应用。 常量代换法是一种常用的解题方法。这对培养学生分析问题和解决问题的能力、对培养学
Constant Substitution refers to the use of certain constants with constant terms, the constant variable to replace or variable into a constant; or different constants to replace; or replace the constant variables directly, so that the solution of the The problem can be transformed, the realization of the difficult as easy, simplification, and ultimately solve the problem. This method has some applications in such issues as identity transformation, algebraic or triangular evaluation, solution of equations (groups), finding of extremums and inequality solving or proving. Constant substitution method is a common method of solving problems. This is to train students ability to analyze and solve problems, to cultivate learning