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在几何中,求证形如(1/a)+(1/b)=1/c的几何证明问题,往往感到棘手。证明此类问题,关键在于变换结论的形式,从变换后的等价命题的各种形式中找到证题途径。
In geometry, it is often tricky to verify the proof of geometry such as (1 / a) + (1 / b) = 1 / c. The key to prove such problems lies in transforming the form of the conclusion and finding the way of the question from various forms of transformed equivalent propositions.