负指数幂的运算 2a1b(ab)1 111-2-22-2-3-2-233-3-3-3-1-3-3-23=2·a·（b）·（c）÷（a）·b =2·（a）·（b）x·(y) =(a·-2+·b)· baab1-2-46b1194-3-6 a-63=2a·b·c÷（ab） =3a·b·x·y=(-2+)· baab22(1)（2abc）÷（ab） （2）2a3b1xy22-3-2-233 (3)ab1a22abb211-2-（-6）-4-36 1911=a·b·c=a·· =(-+)· 4=14a4b-7c6 =14a4·16 b7·c=a4c64b7 =（4）(x-1+y-1)(x-1-y-1) (5)(x=(1x+111y)(x-y) =(=(121x)-(y)2 =11x2-y2 = = = =(7)(a-1+b-1)2-(a-1-b-1)2 =(1a+1b)2-(112 a-b)=(1a+121122b2+ab)-(a2+b2-ab) ==112112a2+b2+ab-a2-b2+ab ==4ab = 8x3y6a9=8x3y6 =-1+y-1)÷(x-1-y-1) (6)(x1x+1y)÷(1x-1y) =(=(yxy+xxy)÷(yxy-xxy) =(yxyxxy÷xy =yxxyxy·y-x =yxy-x =(8) (a-3)2(ab2)-3 =a-6·a-3·b-6 11a·16a3·b6 =1a6•a3•b6 =1a9b6 =ababababa22abb21ab·ab ab2=1ab·ab abab -2+y-2)÷(x-1-y-1) 11x+112y2)÷(x-y) y2x2yxx2y2+x2y2)÷(xy-xy) y2x2yxx2y2÷xy y2x2xyx2y2·y-x x2y2xy y-x x2y2xy2 x2y （9）(2mn2)-2(m-2n-1)-3 =2-2·m-4·(m-2)-3·(n-1)-3 116322·m4·m·n 1m634·m4·n 1234mn 2-3-2-5 （10）(2mn)(mn) （12）(ab)1.(2a)3.(2a2b1)2 -3-32-3-5-2-5 -1-133-22-2-1-2 =2·m·(m)·m·(n)=a·b·(-2)·a·(-2)·(a)·(b) 11111-6-56 3-42·3·m·m·n =··(-8)·a··a·b 2(-2)ab8m11111116 132 =·3·6·5·n=··(-8)·a··4·b ab8m4amm =n62b = = 8m365 =n68m14 (13)12p1q358p2q4 (14)1 =2p1·q35p2·q4 =(8 =45pq = = = = =a233a2b2c322xy1 23a2b2c32x2y1)-6 (3a2b2c3)6(2x2y1)6 36a12b12c1826x12y6 136•1a12•b12•c181 26•1x12•y61729•1a12•b12•c1811 64•x12•y664b12c18x12729a12y6 本文来源：https://www.wddqw.com/doc/a6c424e8c3c708a1284ac850ad02de80d4d806b0.html