
______.

______.
lim _(narrow infty )(dfrac (1)({n)^2+(e)^-1+1}+dfrac (2)({n)^2+(e)^-2+2}+dfrac (
根据数列极限的定义证明:-|||-lim dfrac (sqrt {{n)^2+(a)^2}}(n)=1
用极限的定义证明lim _(narrow infty )dfrac (sqrt {{n)^2+(a)^2}}(n)=1用极限的定义证明
+dfrac (1)(sqrt {{n)^2+n}})= __
+dfrac (1)(sqrt {{n)^2+n}}).求下列极限:.
+dfrac (1)(sqrt {{n)^2+n}})=1
3.lim_(ntoinfty)sqrt[n](2+(-1)^n+2^n)=_.3.$\lim_{n\to\infty}\sqrt[n]{2+(-1)^{n}+
_(n)=((-1))^n+1dfrac (1)(sqrt {n)}-|||-C. _(n)=sin dfrac (npi )(2)-|||-D. _(n)=d
(B) (n-1)(S)^2+(overline {X)}^2 (C) (S)^2+(overline {X)}^2. (D) dfrac (n-1)(n)(S
lim_(ntoinfty)((1)/(sqrt(n^2)+1)+(1)/(sqrt(n^2)+2)+...+(1)/(sqrt(n^2)+n))=_.$\li