问题 填空题
lim
n→+∞
n2+2n+1
2n2-n+1
=______.
答案

lim
n→+∞
n2+2n+1
2n2-n+1
=
lim
n→+∞
1+
2
n
+
1
n2
2-
1
n
+
1
n2
=
1
2

故答案为:

1
2

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