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有些应用题中含一些未知的常量,它们与待求量有联系,将它们设为参数,可使这种联系明朗,从而得到简便解法,这就是“设辅助元”,以下四道赛题,均源于牛顿的“草地与母牛”问题,都能用此法解决,请看:
Some application problems contain some unknown constants. They are related to the quantity to be estabilished. Using them as parameters can make this link clear, so that a simple solution can be obtained. This is called “auxiliary element.” All the problems that originate from Newton’s “grassland and cows” can be solved by this method. Please see: