1.2a^7(y2x2)/x2y2
2.3/2m2x-2/(x+3)
3.xy(y-x)(x+1)(x-1)(x+3)(x-3)
4.(-3y3)/x2z
5.6
6.等边三角形
7.169/4π
选择题CB
10.(1)=2a/(a-b)(2)=1/a2b2
11.x=-1x=5/4
12.画图略S阴=8×10.04/2-5×6.04/2=25.06cm2
13.画图略
14.原式=2/(x+1)2当……时，原式=8
15.A-B=23A-2B=1A=-3B=-5
16.设有x克x/(235+x)=6%x=15
