分式混合運(yùn)算專(zhuān)題練習(xí)

--分式的混合運(yùn)算ac·＝．bdacad÷=·=bdbca求n）.ｎba()=anbnｎb例ab)b2ab2a222,,,12aba2(ab)ab4xya216y2例?(2)23y2a2a2a2xx3a14a4aa14xyyzzx2xyz(4)若yza22234x222----例2ab2（）3（1)(2）c3x2y2y()()()234yxx(2abc)((３）23a3b)2）cy(x22)(xxy)()2223yyx11111132435171918202x1(xx2)x1x2AB例Bx3yx2y2x3yaa3a1221.x2y2x2y2y2x21a1----16x2（3）－a39ax12aa63-+，a3aaa22xyabb2ab(６)⑺⑻x2yxyyx23132x662x9x211y2x2x14x2aa)a2(⑼⑽-.xyxyxy2xx4x4a2a2xa22222x18x9xx33xx2(2x3x293xx2x⑴⑵⑶2x2x24xxxa1a1a1221aaa----a2a24x2x1x3x1)(a2a22⑷⑹⑻⑸4a4x1a22x3(x2x25)11x1⑺x2x1x1x2x122x4x4x2x1xyx2y11221x2x⑼x242xx3x2x122222⑽(abab⑾x(chóng)1x1x3abab2(x2x14x4x)4x()()()x2xyy22234x22xx22yxx3m(m22m45)(１(１、m22x644xx2x2x63x(x----12abbc112222x33x22ab44xx2223xx2x14x()3xx2xx4x42x23x21xxx1x1xx2x1x12÷x212xx1111+＋。a(a(aa2)(a2)(a(a2005)(a2006)----4x1A=＋B(x2)(x5x2x2＝，y==，求y22１2y13yy１2y3=xyy2+-x4xyxyxy22yx＋xy1x2xxx142111ba1＋=a2:則。a22則a2ababab1+=a4．a(chǎn)42xyyx4y4x2x2２·2xxyyxyy2y22----2x6x2x6x3.44xx22x6x2x6x344xx22x6＝２44xx2xx)2==2x2③x2b4a2abba32222a2·÷(ab)2b2b35x35y11。33x3yxyxyxy1x24xy4y02。11。，則2x3y784x6y92211若m-nmn。----111a1b互為倒數(shù)，且ab則ab。1若51則。x2xx2x2xy1,則用含的代數(shù)式表示y1。xx24yy24()?xy。xyy9yx若,則（12005?()2006。x10xyxa則ba2b2=a2b2112aabbaabb3abaab倍)bba倍bababa倍bab11①1222②3233③3444455n----123456:，，,，，n3815243548a11)11abababababvv12()vt2vv1vt1vv1vv12vvvt