12 月 1 日分式计算补充练习1.1x+1− x+3x2−1⋅x2−2 x+1x2+4 x+3 2. （x+2x2−2x−x−1x2−4 x+4)÷ x−4x3. (1−11−x )( 1x2 −1) 4. (xx−2− xx+2 )÷ 4 x2−x 5. 3−m2m−4 ÷(m+2−5m−2 ) 6. 1− a−ba+2b ÷a2−b2a2+4ab+4b27. x3x−1−x2−x 8. 1x2+3 x+2+1x2+5 x+6+1x2+4 x+39. x+2 y+ 4 y2x−2 y + 4 x2 y4 y2−x2 10. ( x−y+ 4 xyx−y )(x+ y− 4 xyx+ y )11. x+ y( x−y )( y−z)+x+z( y−x)( y−z ) 12. a2+5a+4a2+a−6 ÷a2+3 a−4a2−6a+8−113. (a+b)2(a−b)(b−c)+6ab(b−a)(b−c )−a2+b2( a−b)(c−b) 14. x2−y2xy÷( x+ y)15. x−1x2+3 x+2−6x2−x−2− x−10x2−4 16. xx−y⋅ y2x+ y − x 4 yx 4−y4 ÷x2x2+ y2
