分式与分式方程练习题1、 化简下列分式(1 ) (2) (3) (4)2-ac4b24-a2x-16+82x1-2、 计算(1 ) (2) (3) 25xy 2ab-x( ) 225x-y9(4 ) (5 ) (6)2a-b-+13ca-b1-x3+(7 ) (8 ) (9)22a3+1a-21ab+-( ) ( ) n1+-m( ) ( )(10 ) (11)2m-6+19321m+n2n5+m( ) ( ) ( )3、 解方程(1 ) (2) (3) 21=x1x-+3=-22x1=+33(4 ) (5 )2x1=413=x648(6 ) (7 )1x+=24237+=x6