6、极限运算法则 设limf(x)=A,img(x)=B,则 x→>x0 x→x (1)im(f(x)±g(x)=A±B; x→x (2)limf(x)·g(x)=A·B; x→>x0 (3)lim f(r) x-xo g(x) B 其中B≠06、极限运算法则 , 0. ( ) ( ) (3) lim (2) lim ( ) ( ) ; (1) lim ( ( ) ( )) ; lim ( ) , lim ( ) , 0 0 0 0 0 =   =   =  = = → → → → → B B A g x f x f x g x A B f x g x A B f x A g x B x x x x x x x x x x 其 中 设 则