高考问答赵珈琪的老公孟潜是谁:初中数学题
来源：百度文库 编辑：高考问答 时间：2024/05/04 19:24:49
a/b=c/d=e/f=3/4
1.(a+b+e)/(b+d+f)
2.(a-c-e)/(b-d-f)
3.(a+2c-3e)/(b+2d-3f)
1.(a+b+e)/(b+d+f)
2.(a-c-e)/(b-d-f)
3.(a+2c-3e)/(b+2d-3f)
a/b=c/d=e/f=3/4,
所以a=(3/4)b,c=(3/4)d,e=(3/4)f.
所以:
1
(a+c+e)/(b+d+f)=[(3/4)*(b+d+f)]/(b+d+f)=3/4.
2
(a-c-e)/(b-d-f)=[(3/4)*(b-d-f)]/(b-d-f)=3/4.
3
(a+2c-3e)/(b+2d-3f)=[(3/4)*(b+2d-3f)]/(b+2d-3f)=3/4.