测试6分式的混合运算一、填空题1.化简2222639abbaba_____.2.化简2426aaab=______.3.计算)1()1111(2mmm的结果是______.4.)1(yxyyx的结果是______.二、选择题5.2222yxyxyxyx的结果是()A.222)(yxyxB.222)(yxyxC.222)(yxyxD.222)(yxyx6.222)(babbba的结果是()A.b1B.2babbaC.babaD.)(1bab三、计算题8.xxx11110.242xx12.)()(nmmnmnmmnm综合、运用、诊断一、填空题14.babababa______.15.32329122mmm______.二、选择题16.(1-m)÷(1-m2)×(m+1)的结果是()A.2)1(1mB.2)1(1mC.-1D.118.abbaba2223231等于()A.abaB.babC.aba323D.bab23219.实数a、b满足ab=1,设,11,1111bbaaNbaM则M、N的大小关系为()A.M>NB.M=NC.M<ND.不确定三、解答下列各题20.yyyyyyyy4)44122(22四、化简求值22.,)]3(232[xyxyxxyxyxx其中5x+3y=0.