例 10
2
1
lim(2 3 4)
x
x x
2
1
lim(2 )
x
x
.1
2
1
2lim
x
x
1
lim 3
x
x
1
lim( 4)
x
1
3lim 4
x
x
2
1
2(lim ) 3 4
x
x
代数和的极限等于极限的代数和 .
lim[ ( ) ( )]f x g x A B
lim[ ( )] lim ( )cf x c f x
lim[ ( )] [lim ( )]
n n
f x f x
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