若a+b=4ab 则代数式2a-ab+2b/2ab值为?

问题描述:

若a+b=4ab 则代数式2a-ab+2b/2ab值为?

(2a-ab+2b)/2ab
=(2a+2b-ab)/2ab
=[2(a+b)-ab]/2ab
=(2*4ab-ab)/2ab
=7ab/2ab
=7/2
=3.5
希望能够帮到你!

a+b=4ab
则1/a+1/b=4
2a-ab+2b/2ab
=1/b-1/2+1/a
=3.5

2a-ab+2b/2ab
=[2(a+b)-ab]/2ab
=(2*4ab-ab)/2ab
=7ab/2ab
=7/2