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()6+()6=_________;若n为奇数,则()4n+()4n=_________.
()6+()6=________;若n为奇数,则()4n+()4n=________.
6+log6
=
2011
2012
2009
2010
(×)6-4()+(lg2)2+lg2·lg5+lg5=________
若||=||=1,⊥且2+3与k-4也互相垂直,则实数k的值为
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