高中数学代数与函数一其他练习题2
题目内容

用数学归纳法证明:1+ http://picflow.koolearn.com/upload/papers/20140823/20140823223533839336.png+ http://picflow.koolearn.com/upload/papers/20140823/20140823223533855325.png+ http://picflow.koolearn.com/upload/papers/20140823/201408232235338701083.png时,在第二步证明从n=k到n=k+1成立时,左边增加的项数是(   )

2021-07-12

A.http://picflow.koolearn.com/upload/papers/20140823/20140823223533886366.png

B.http://picflow.koolearn.com/upload/papers/20140823/20140823223533901412.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823223533917168.png

C.http://picflow.koolearn.com/upload/papers/20140823/20140823223533933391.png

D.http://picflow.koolearn.com/upload/papers/20140823/20140823223533948420.png

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