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现行高二代数课本中对数的基本性质3的证明没有考虑到若y=0则x=1的情况,大概是因为很显然,我看还是应该提一下,而且全
The proof of the basic nature of the logarithm of the current second-generation algebra textbook does not take into account the fact that if y = 0 then x = 1, probably because it is obvious that I should mention it, and it should be