问题
填空题
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答案
lim n→∞
=3n2-n 1+2+…+n lim n→∞
=3n2-n n(n+1) 2 lim n→∞
=6n2-2n n2+n lim n→∞
=6，6 - 2 n 1 + 1 n
故答案为6．
搜题请搜索小程序“爱下问搜题”
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lim n→∞
=3n2-n 1+2+…+n lim n→∞
=3n2-n n(n+1) 2 lim n→∞
=6n2-2n n2+n lim n→∞
=6，6 - 2 n 1 + 1 n
故答案为6．
