Question

(a-b):(b-c):(c-a)=2:3:7 求3a+2b-4c/2a的值

Answer 1

(a-b):(b-c):(c-a)=2:3:73(a-b)=2(b-c)7(a-b)=2(c-a)整理得,5b-2c=3a7b+2c=9a解得,b=a,c=aa-b=0,因此(a-b):(b-c):(c-a)=2:3:7不成立若不考虑上述因素,则：(3a+2b-4c)/2a=(3+2-4)/2=1/2