近年来高考中常遇到有关焦点三角形的计算问题,这类题目通法是根据定义求解,但在具体解题时常常因为计算量大而半途而废.若能借 In recent years, college entrance examination frequently encountered in the calculation of the focal point of the triangle, the problem of this type of problem is solved according to the definition, but the specific problem-solving often because of the large amount of calculation and halfway through.