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题型:综合题 题类:常考题 难易度:普通
探索数与式的规律++++++++(1)
=1﹣ , = ﹣ , = ﹣ ,
将以上三个等式两边分别相加得: + + =1﹣ + ﹣ + ﹣ =1﹣ = .
① + + +…+ =;
② + + +…+ =.
①2,﹣4,8,﹣16,32,﹣64,…;
②0,﹣6,6,﹣18,30,﹣66,…;
③1,﹣2,4,﹣8,16,﹣32,…;
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