2.lim(1+ 证:当x>0时,设n≤x<n+1,则 (1+ n+1)<(1+1)x (1+1) 1+ n+1 lim(1+ n+ e n+ n→>0O n+1 im(+1) 7+1 lim[(1+1)”+1)] n→ lim (1+ e x→)+ 学 HIGH EDUCATION PRESS ◎令08 机动目录上下臾返回结束2. e x x x lim (1 ) 1 证: 当 x 0 时, 设 n x n 1, 则 x x (1 ) 1 1 1 (1 ) n n n n (1 )1 1 n n n lim (1 )1 1 lim n 1 1 1 (1 ) n n 1 1 1 n e 1 1 lim (1 ) n n n lim [(1 ) 1 ] 1 n n( 1 n ) n e e x x x lim (1 ) 1 机动 目录 上页 下页 返回 结束