2006数学四.pdf
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2006
2006
106 ,
05
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2
07
306
06
07
U-
4 24
n + 1 n
1lim( )(− 1) 1
n→∞ n
n + 1
lim( )n
n→∞ n
n + 1 n
un ( )(− 1) , n 1,2,3, …,
n
2k −1 2k − 1 1 1
n 2k − 1un ( ) 1− 1−
2k − 1 2k 2k n + 1
2k +` 1 1 1
n 2k un ( ) 1+ 1+
2k 2k n
n + 1 n
lim( )(− 1) 1
n→∞ n
2006 1.171.3218
(2) x 2 ′ f (x ) ′′′ 3
f (x) ,f (x) e , f (2) 1f (2) 2e .
f (x) x 2 f ′(x) ef (x ) f ′(x)
x 2 f (x)
f ′′(x) [ef (x ) ]′ f ′(x
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