摘要：3．计算:log155log1545+(log153)2 解一:原式 = log155(log153+1)+(log153)2=log155+log153(log155+log153) =log155+log153×log1515=log155+ log153= log1515 解二:原式 = =(1-log153)(1+log153)+(log153)2 =1-(log153)2+(log153)2=1
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