高中数学代数与函数一其他练习题2
题目内容

下面四个判断中,正确的是(  )

2021-07-12

A.式子1+k+k2+…+kn(n∈N*)中,当n=1时式子值为1

B.式子1+k+k2+…+kn-1(n∈N*)中,当n=1时式子值为1+k

C.式子1+http://picflow.koolearn.com/upload/papers/20140824/20140824044642004478.png+…+http://picflow.koolearn.com/upload/papers/20140824/20140824044642020496.png(n∈N*)中,当n=1时式子值为1+http://picflow.koolearn.com/upload/papers/20140824/20140824044642004478.png

D.设f(x)=http://picflow.koolearn.com/upload/papers/20140824/20140824044642067774.png(n∈N*),则f(k+1)=f(k)+http://picflow.koolearn.com/upload/papers/20140824/20140824044642082854.png

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