+dfrac (1)(sqrt {{n)^2+n}})= __
+dfrac (1)(sqrt {{n)^2+n}}).求下列极限:.
-|||-+dfrac (1)({n)^2+n})
求极限lim_(ntoinfty)(sqrt[n]((1^2+n^2)(2^2+n^2)...(n^2+n^2)))/(1+2+...+n).求极限$\lim_
注 类似地,求极限lim_(ntoinfty)sqrt[n](((1^2+n^2)(2^2+n^2)...(n^2+n^2))/(1+2+...+n))注 类似
+dfrac (n)({n)^2+n}) __
+dfrac (n)({n)^2+n})求极限
_(n)=((-1))^n+1dfrac (1)(sqrt {n)}-|||-C. _(n)=sin dfrac (npi )(2)-|||-D. _(n)=d
+dfrac (1)(sqrt {{n)^2+(n)^2}})= )=______.______.
+dfrac (n)({n)^2+n})= n/+n)=- __