问题
选择题
|
答案
lim n→∞
=1 2n(
-n2+1
)n2-1 lim n→∞
+n2+1 n2-1 2n(
-n2+1
)(n2-1
+n2+1
)n2-1
=lim n→∞
=
+n2+1 n2-1 4n
，1 2
故选B．
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|
lim n→∞
=1 2n(
-n2+1
)n2-1 lim n→∞
+n2+1 n2-1 2n(
-n2+1
)(n2-1
+n2+1
)n2-1
=lim n→∞
=
+n2+1 n2-1 4n
，1 2
故选B．