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2^2006+2^2007+2^2008 =2^2006(1+2+2^2) =2^2006*(1+2+4) =7*2^2006
我想是樓主說的不够清楚:樓主的意思是(以2為例吧):2開方開不盡,問:根號2是不是無理數.我對樓主的回答:完全正確!證明思路:1.任何有理數的開方都可以歸結為整數開方;2.任何整數的開方問題都可以化為非平方數…
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