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纵观近几年的各级各类试题,多元问题以其解法灵活、思维发散等特点渐渐成了命题者的新宠,而且往往处于压轴题的位置.处理多元问题时,由于形式繁琐,未知数较多,考生往往无从下手.下面结合例题谈谈这一类问题的常见解法.1三角换元例1(2013徐州市高三摸底考试第14题)已知a,b,c是正实数,且abc+a+c=b,设p=
Looking at the various types of questions at various levels in recent years, multivariate problems have gradually become the new darling of propositioners with their flexible solutions and divergence of thinking, and they are often in the position of the finale. When dealing with multivariate problems, due to the cumbersome format, the number of unknowns is relatively small. Many candidates are often unable to start. The following examples of common problems to discuss this type of problem solution. 1 triangle replacement example 1 (2013 Xuzhou high school bottoming exam question 14) known a, b, c is a positive real number, and abc + a+c=b, set p=