问题
填空题
(文)
|
答案
(lim n→∞
-n3 2n2-1
)n2 2n+1
=lim n→∞ n3(2n+1)-n2(2n2-1) (2n2-1)(2n+1)
=lim n→∞ n3+n2 4n3+2n2-2n-1
=lim n→∞ 1+ 1 n 4+
-2 n
-1 n2 1 n3
=
.1 4
故答案为:
.1 4
(文)
|
(lim n→∞
-n3 2n2-1
)n2 2n+1
=lim n→∞ n3(2n+1)-n2(2n2-1) (2n2-1)(2n+1)
=lim n→∞ n3+n2 4n3+2n2-2n-1
=lim n→∞ 1+ 1 n 4+
-2 n
-1 n2 1 n3
=
.1 4
故答案为:
.1 4