15.2.1分式的乘除同步練習(xí)

1、221.填空題約分:m22m 12m2.計(jì)算:(2c)4ab2)22c)i.2.3.4.5.1.2.“分式的乘除法”復(fù)習(xí)題2aa 3n 2b（n為正整數(shù)）吐)4(x)2y)32、xy )2y )11(至V1y（孰一；（xyx2)2xyxy2x y2x判斷題下列運(yùn)算正確的打“ “”，錯(cuò)誤的打“X”2x2(Jz2x)33y3zb2()a2n2b3(37)選擇題已知x:在分式B.94x y2zb4n2na（n為正整數(shù)）（8b927a6則分式27266xy2x 2y（x匯的值是2yx2C.D.14132x2 2 x yx(x y)23x2x中，最簡(jiǎn)分式有（）22x2x 6 x23x 10 2(x 5)

2、四.計(jì)算3y2(a b)y ab a2x22 2A.2x2yxyB.2x2x1(x222x21xyxyxxa b2C.a(c、2cD.b2b(ab)2 .2a bA. 1個(gè)B. 2個(gè)C. 3個(gè)3.下列各式正確的是（）D. 4個(gè)1.8x* 2(43X3)6zT2.3x233(ab3)(b a2、2(ba）x32x2x2x24x4x212x 6x2x 65.(x 3)2c x X6.x 18.(叮)2aba27a7.P5103a 1a24a 4a2a 13x(22(xxx 2)9.(a22a2 3x )(a22ax x2)210.12.13.x2b2x4(a2ax2 2x )2abb22bca2b

3、2(x y)22xy y2 3yx3yc21x31x32aca2b2c22abxy厶2-1 y)(X21 -y2x24x 432小x 2x x 2x21x32x2x2x24x4x21a7b2 (a2b2)43(a b)a2一224a2b 4ab2b3b亠1116 (8a 2b )一2 2，其中a-,bo2b5ab 3a b5ab 6a2414.2x 1612 4xx24x 4(X 2)a2(b a)/215.(a x)3(a x)3(a2x2)(a x)(a x)“ m1彳bc1.;a 1；-21 ma【試題答案】2424a b c；1ab41;27a91.x2. x3.x4.1. C 2.

4、B3. B1.解: 原式8x23x4y36z-x y36 xzy2.解: 原式27x9(a b)3(a b)(a2abb2)(a b)2(b a2)227(a3.解: 原式(y a)(y b) (a x)(ax)(y a)(xa)4.解: 原式5.解: 原式6.解:原式7.解: 原式8.解: 原式9.解: 原式(x a)(x b) (b y)(b y)(x b)(b y)229b)(a ab b )x(a b)(b a2)2(y a)(x a) (xb)(y b)(x 3)2(x 3)(x2)(x 5)(x2)(x 3)(x 3)x 32(x 5)2(x 3)1(x2)2x2x2xxx21(x

5、 3)(x 2)3 x(1 x)(x2x 1)2x(12X )(X2)x2x 1(x(x2)(x1)2)(a 2)(a 5)(a 1)(a 5)2(a 1)(a a(a b)2(a b)21)(a 2)3a(a b)33a (aa 22a aa2b2a(a b)2b2(a x)4(a x)3(a x)3(a2x2)(a x)(a x)010.解：原式(abc)(abc)(abc)(abc)abc(abc)(abc)(abc)(abc)abc11解：原式 &y)2 (x y) y(x y) y(x y)(x y)(x y)2y12.解：原式2x 3y 2x 3yx6 2x 3y 2x 3y2x 3y 2x 3y 2x 3y 2x 3yx613.解：原式x2(x 2) (x 2) (x 2)2(x 1)(x 1)(x 2)2x2(x 2) (x 2) x21(x21)(x 2) (x 2)2(x 1)(x 1)(x 2)2(x 1)(x 1)(x 2)x21x 2x 214.解：原式坐卑as x 8(x 2)4(3 x) x 22(3 x)(x 2)15.解：原式a7b2(a b)4(a b)488(a b)3b2(a b)3(a b)a2a6(b a)33a216.解：原式2(2ab)(2a(2b a)(b 2a)2b(2a b)b(b