Question

已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4,求a+c+e的值.

Answer 1

已知a/b=c/d=e/f=3,求(a+3c-e)/(b+3d-f)的值:若b+d+f=4,求a+c+e的值

(a+3c-e)/(b+3d-f)

=(3b+9d-3f)/(b+3d-f)

=3(b+3d-f)/(b+3d-f)

=3

(a+c+e)/(b+d+f)

=(3b+3d+3f)/(b+d+f)

=3

若b+d+f=4,则 a+c+e=12