beta.1分式的化简与求值姓名x+-x6+1-2例1化简xx+x3+xx3例4若a+b-ca+1-a+2a-2+例2化简分式.16x61312a2+3a+2a2-a-53a2-4a-52a2-8a+5-a-3c=b=a,求abca-b+c-a+b+c(a+b)(a+c)(b+c)的值。2a2+bc+2b2+ac2c2+ab的值。例5已知abc=0,求a2b2c2+例3已知abc=1,求a+cab+a+1bc+b+1ca+c+1的值。b+第1/4页beta.1分式的化简与求值姓名08.若1一、填空题A卷x-112x+3xy-4y2y=3,则x-3xy-2y=_。01.代数式3+、2、1x2-y2x+yz+xx-11y、2(x-1)1+x中程分式的代09.已知3a2+ab2b2=0(a0,b0),则aa-a2+b2xp数式是_。、x+b-bab=_。x2-mx+1=1,则02使分式1+12+13+1x无意义的值共有_个。10.设x二、解答题x3x6-m3x3+1=_。03.当x=_时,分式x-311.计算x2+6x+104x+12的值为零。x2+6x+9+x2-112x2+8x+5x2-9-x2+4x+3y=5y=7x-y04x2y+z=_。05.化简abb1+-12.已知a+b+c=0,求a1b+b+c+3的值。06.化简,baa2+2ab+b2aab+b2=_。11111ccaab21(m+n)3m+1nm2+2mn+n2m2+m3n3=_。111m-nn213.求(19942-2000)(19942+3985)19951991199319961997的值。07.化简(2x-3y)32x-3y+1-(3y-2x)2-2x-3y2x-3y-1+2x-3y=_。第2/4页beta.1分式的化简与求值姓名10.若xyz0,且xx+y,则x一、填空题B卷y+z=yz+x=zx+y+z=_。01.化简3x-6yx+y-7x-8yx+y-x-yy-x=_。5x-6y4x-5y-二、解答题11.若ax-1+b(xy2)2=0,且ab0,求02.化简11-x1+x1+x2+1+x4+1+124=_。1xy+1(x+1)(y+1)(x+2)(y+2)+1(x+1997)(y+1997)。03.化简2a-b-c+2c-a-b(a-b)(a-c)(b-c)(b-a)(c-a)(c-b)=_。04.若x25x1=0,则2x29x352b-a-c+x2+1=_。05.若a、b、c为非零有理数,且abc=0,则ab12.已知4x34x2yxy2y3=0,求x2+y2ab+bccabc+ca=_。xy的值。06.若1x=2y+z=3z+2yz+x,则x=_。x2+5y2+7z2=x+-x6+1-208.化简xx6x+x3+xx313化简分式x+11x2+1-x-1+3-x+-x1-x-1xxx2+x2-2x-x+309.若a23a+1=0,则a32x2+3y2+6z207若4x3y6z=0,2x+4y14z=0（z0）,则_。16=_。131a6+1=_。第3/4页12x2x212beta.1分式的化简与求值姓名10.若abc=1,则aab+a+1bc+b+1ca+c+1=_。一、填空题C卷+bc01.计算x3nxn-1-xn+1xn-1+xn+1x2n11-=_。二、解答题02.化简a2+b2+2a+a3-a3x=3,求x10+x8+x2+111.设x1b3bab2a2b2a2bab3-3a-ba2+b2-2b=_。x10+x6+x4+1的值。03.已知x25x1999=0,则(x-2)4+(x-1)2-1y-y=_。05.若x+y+z=3a,则(x-a)(y-a)(z-a)(x-1)(x-2)=_。04.若xy2=0,2y2+y4=0,则x(x-a)3+(y-a)3+(z-a)3=_。12.+324)(22+324)(34+324)(46(104444+324)(44+324)(164+324)(284+324)(404+324)求的值。a+b,且a0,b0,ab,a+b0,则x+2a06.若x=4abx+2bx-2a+x-2b=_。13.设a、b、c是不为0的有理数,且ab=2(ab),bc3(bc),ca4(ca),求abc的值。1,a+b+c+=-3,求abc的值。07.化简(y-x)(z-x)(z-y)(x-y)(x-z)(y-x)(x+z-2y)(x+y-2z)+(x+y-2z)(y+z-2x)+(y+z-2x)(x+z-2y)=_。08.n3100能被n10整除的正整数n的最大值为_。