乘法 Canx)∑bx")=∑cnx x∈(-R,R =0 H=0 (其中Cn=ao·bn+a1bn1+…+an,b) 除法 (收敛域内∑bx"≠0) n-=0 ∑anx n=0 ∑ cx n ∑bx -=0乘法 ( ) ( ) 0 0    =  =  n n n n n an x b x . 0   = = n n cn x x (− R,R) (其中 ) a0 b a1 b 1 a b0 cn n n n =  +  + +  −  除法    =  = 0 0 n n n n n n b x a x . 0   = = n n cn x ( 0) 0    n= n n 收敛域内 b x