小结:1.设f(x)=anx2+a1xn1+…+an,则有 lim f(r)=ao(lim x)"+a,lim x)+.+a, =a0x0+a1x0+…+an=∫(x0) 2设/秒P(x),且(x0)≠0,则有 e(r) lim f(x) lim P(x) P(yol=/(o). x→x x→x0o im e(x) O(%o 若Q(x0)=0,则商的法则不能应用 Economic-mathematics 16-4 Wednesday, February 24, 2021Economic-mathematics 16 - 4 Wednesday, February 24, 2021 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