log(2+√3)(2-√3),
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log(2+√3)(2-√3),
(2+√3)*(2-√3)=1
所以(2-√3)=(2+√3)^(-1)
log(2+√3)(2-√3)
=log(2+√3)(2+√3)^(-1)
=-log(2+√3)(2+√3)
=-1
所以(2-√3)=(2+√3)^(-1)
log(2+√3)(2-√3)
=log(2+√3)(2+√3)^(-1)
=-log(2+√3)(2+√3)
=-1
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