2011.1.81(X-2y)2(2y-x)32.xn.xn-1+xn+1xn-2+(-x)3(-x)2n-43.已知52x+1=125求（x-2）2001+3x4.已知2x=3求2x+32011.1.95．(m-n)2(n-m)3(n-m)46.(y-x)3(x-y)5+（x-y）6(y-x)27,(a+b)9(-a-b)4+(a+b)6(a-b)78.已知x3xax2a+1=x31求a的值。2011.1109．已知2m=4，2n=16求2m+n的值10.3333333333211.82002?0.125200212。（-8）9?0.12582011.1.1113.3(X2)3X3-(2X3)3+(5X)2X714.–aa5–(a2)3–(-2a3)215.2(a4)2(a3)3-(-a)(a8)2+(-3a2)2(-a4)3(-a)16.(-2a)6-(-3a3)2-[-(2a)2]32011.1217.已知m=c3cc4bbn求m18已知44?83=2x求x192a?27b?37c=1998,a,b,c是自然数求（a-b-c）2002的值20。(.9n)2=316求n值2011.1.1321如果28n16n=222求n值22.[(x+y)2]3{(x+y)3}4-2[(x+y)3]623.比较355544445333三个数大小24。若a=255,b=344c=433比较a,b,c.的大小2011.1.14125.比较11112222与22221111大小26。-6a2b(x-y)33ab2(y-x)227(-7xmym)2(-xy)3-[4x2m(-x)3y2my328.(-2an+1bn)2(-3anb)2(-a2c)2011.1.1529[(x+2y)3]5[-(x+2y)2]530.3(a+b)2[2(-a-b)3]+[2(a+b)]3(-a-b)231(21?103)(25?102)2(-2?1010)3432.若2a=3,2b=6,2c=12求证2b=a+c2011.1.1633..(122132ab-3ab+1)(0.2ab)3334.12xny2[3yn-1-2xyn+1+(-1)888].35.(3a2b-2ab2-4b3)(-4a2b)36.3xn(xn+1-xn+xn-1-1)2011.1.1737..4(x-y+z)-2(x+y-z)-3(-x-y-z)38.(-5xy)2(-xy)3+(4x2y-3x)(-x3y4)+x5y539.5x-2(x+2)-3[x-2(3-5x)+7]40..2x2(x2+3xy-y2)-xy(6x2-4y2)+y2(2x2-4xy+y2)2011.1.1841.若x2+x-1=351,a+b+c=5,a(x2+x+1)+b(x2+x+1)+c((x2+x+1)的值6742.（a-b+c）(-a+b+c)43.(-7+a+b)(-7-a-b)44.(-3x+4)(-3x-4)2011.1.1945.4(x-2)(x+5)-(2x-3)(2x+1)=546.(3x-2)(2x-3)?(6x+5)(x+1)47.2x(x+1)+(-2x)2+1?x(3x+4)+3x24810-4(x2+x-3)?2(-2x2+x-1)！2011.1.2049（1+011111）(1+2)(1+4)(1+8)+222221550。1.02?0.98512001?1999-2000252。9822011.1.21533（4+1）2+1）+1（利用乘方公式）54（44x(x-1)2+x(2x+5)(5-2x)55(4y+3x-5z)(3x-4y+5z)56(x-1)(x4+1)(x2+1)(x+1)2011.1.2257.2(3a+1)(1-3a)+(a-2)(2+a)58.(2-y)(y+2x)-(2y+x)(2y-x)594x(x2-2x-1)+x(2x+5)(5-2x)60.5x2-(2x+3)(x-3)+2(x=1)(x-1)-(3x-1)(1+3x)2011.1.2361.(a+1)(a2+1)(a4+1)…..(a2000+1)62.(1-111112)(12)(12)…(12)(12)23491063(a+b)2(a-b)2-(2a+b2(2a-b)264.(a+b+c)22011.1.2465(a-b)(a+b)2-2ab(a2-b2)66.20002-2001?1