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在解析几何计算题中,常有若干个变量之积或积的计算或证明问题,此类问题若使用韦达定理,把若干个变量转化为若干次方程问题,会简化计算。现举三例:
In analytical geometry calculation problems, there are often calculations or proofs of the product or product of several variables. If we use the Weddah’s theorem to solve these problems, converting some variables into several equations will simplify the calculation. Here are three examples: