若a/b=c/d=e/f=2/3,则(a+3c-e)/(b+3d-f)=________
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若a/b=c/d=e/f=2/3,则(a+3c-e)/(b+3d-f)=________
若a/b=c/d=e/f=2/3,则(a+3c-e)/(b+3d-f)=________
若a/b=c/d=e/f=2/3,则(a+3c-e)/(b+3d-f)=________
如果是填空题,可以把a c d全部看做2,b d f全部看做3,代入原式,得到2/3
实际上,a和b、c和d、e和f之前系统都相同,所以比值不变,还是2/3