分章同步练习13--数学归纳法、极限

练习13：数学归纳法、极限
n+1
?
b?b
(b≠1)
2n?
n+1
b+b+L+b?
(1?b)(1+b)
a==
n?
n+1
(1+b)
n
?
(b=1)
n+1
?
?2
n+1
1b?b1
(3)S=1?ba?=1?b??
nn
nn+1n
(1+b)(1?b)(1+b)(1+b)
n+1
1b(b?b)1
n+1
=1??()(b≠1),
n
1?b1+b
(1+b)
1
nn
Q0limlimlim
n
n→∞n→∞1+bn→∞


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