lim┬(x→0+)〖2(x+1)arctan□(1/x)〗

问题描述:

lim┬(x→0+)〖2(x+1)arctan□(1/x)〗

lim arctan(1/x)=pi/2 x→0+
lim┬(x→0+)〖2(x+1)arctan□(1/x)〗=2*1*pi/2=pi