小结:1.设∫(x)=anx"+a1x"1+…+an,则有 imf(x)=a(Iimx)"+a1(limx)”+…+an x→x x→x x→x0 =a0x0+a1x0+…+an=∫(x0) 2设∫(x)= P() 且Q(x0)≠0,则有 lim P(x) lim f(x)= P(x0) lim e(x (o) 若Q(x0)=0,则商的法则不能应用小结: 1.设 f (x) = a0 x n + a1 x n−1 ++ an ,则有n n x x n x x x x f x = a x + a x + + a − → → → lim ( ) 0 ( lim ) 1 ( lim ) 1  0 0 0 n n n = a x + a x + + a −  1 0 0 1 0 ( ). x0 = f 设 , 且 ( ) 0, 则有 ( ) ( ) 2. ( ) = Q x0  Q x P x f x lim ( ) lim ( ) lim ( ) 0 0 0 Q x P x f x x x x x x x → → → = ( ) ( ) 0 0 Q x P x = ( ). x0 = f ( ) 0, . 若Q x0 = 则商的法则不能应用