问题 填空题
计算:
lim
n→∞
2n2+n+3
(2n+1)2
=______.
答案

lim
n→∞
2n2+n+3
(2n+1)2
=
lim
n→∞
2+
1
n
+
3
n2
4+
4
n
+
1
n2
=
2+0+0
4+0+0
=
1
2

故答案为:

1
2

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