若a+b=4ab,则代数式(2a-ab+2b)/2ab的值为?
问题描述:
若a+b=4ab,则代数式(2a-ab+2b)/2ab的值为?
答
(2a-ab+2b)/2ab =[2(a+b)-ab]/2ab =(2*4ab-ab)/2ab =7ab/2ab =7/2
若a+b=4ab,则代数式(2a-ab+2b)/2ab的值为?
(2a-ab+2b)/2ab =[2(a+b)-ab]/2ab =(2*4ab-ab)/2ab =7ab/2ab =7/2