2f5)Ay-} 注 i= -6a12 2+ 2 .6rdk=m25ax y=x i= a+2+月 lim -→06n i 1x n 3 Ooo⊙O8 o 1 x y n i i i n i  f x = ( ) 1   = = n i i n 1 2 3 1 ( 1)(2 1) 6 1 1 3 =  n n + n + n ) 1 )(2 1 (1 6 1 n n = + + i n i i  x x =  x  = → 1 2 0 1 0 2 d lim   → = n lim 3 1 = 2 y = x 注 注 目录 上页 下页 返回 结束