·利用洛必达法则求下列函数的极限:lim(x→0)x/(e^x-e^(-x))
问题描述:
·利用洛必达法则求下列函数的极限:
lim(x→0)x/(e^x-e^(-x))
答
1/2
答
lim(x→0)x/(e^x-e^(-x))
=lim(x→0)1/(e^x+e^(-x))
=1/2
答
lim(x→0)x/(e^x-e^(-x))
=lim[1/(e^x-e^(-x)*(-1)]
=lim[1/(e^x+e^(-x)]
=lim[e^x/(e^(2x)+1]
=1/(1+1)
=1/2