学了e的定义吗?e=lim(x->0)(x+1)^(1/x)或lim(x->∞)(1+1/x)^x
lim(x->0)[ln(x+1)]/x
=lim(x->0)(1/x)[ln(x+1)]
=lim(x->0)[ln(x+1)^(1/x)]
=ln[lim(x->0)(x+1)^(1/x)]
=lne
=1
学了e的定义吗?e=lim(x->0)(x+1)^(1/x)或lim(x->∞)(1+1/x)^x
lim(x->0)[ln(x+1)]/x
=lim(x->0)(1/x)[ln(x+1)]
=lim(x->0)[ln(x+1)^(1/x)]
=ln[lim(x->0)(x+1)^(1/x)]
=lne
=1