lim(x->0)((2-x)/(3-x))^1/x
问题描述:
lim(x->0)((2-x)/(3-x))^1/x
答
lim(x->0)((2-x)/(3-x))^1/x =lim(x->0)exp {1/x* [ ln(2-x)-ln(3-x) ] }x->0+ 1/x* [ ln(2-x)-ln(3-x) ] ->ln(2/3)/x->+OO exp {1/x* [ ln(2-x)-ln(3-x) ] }->+OOx->0- 1/x* [ ln(2-x)-ln(3-x) ]->ln(2/3)/x->-OO e...