1个回答
展开全部
a1/b1=1/3,b1=3a1①
(2a1+d1)/(2b1+d2)=2/5
2(6a1+d2)=5(2a1+d1)
2a1+2d2=5d1②
(3a1+3d1)/(3b1+3d2)=3/7
7(a1+d1)=3(3a1+d2)
2a1+3d2=7d1③
②③联立5d1-2d2=7d1-3d2
d2=2d1代入②得2a1=d1
d2=2d1=4a1=4b1/3
a5/b6=(a1+4d1)/(b1+5d2)
=9a1/(1+20/3)b1
=3/(1+20/3)
=9/23
(2a1+d1)/(2b1+d2)=2/5
2(6a1+d2)=5(2a1+d1)
2a1+2d2=5d1②
(3a1+3d1)/(3b1+3d2)=3/7
7(a1+d1)=3(3a1+d2)
2a1+3d2=7d1③
②③联立5d1-2d2=7d1-3d2
d2=2d1代入②得2a1=d1
d2=2d1=4a1=4b1/3
a5/b6=(a1+4d1)/(b1+5d2)
=9a1/(1+20/3)b1
=3/(1+20/3)
=9/23
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询
广告 您可能关注的内容 |