问题 填空题
 
lim
n→∞
2+3+…+n
3n2-2n
=______.
答案

 
lim
n→∞
2+3+…+n
3n2-2n
=
lim
n→∞
(n-1)(n+2)
2
3n2-2n
=
lim
n→∞
n2+n-2
6n2-4n
=
1
6

答案:

1
6

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