已知1\a+1\b=2,则ab\2a+2b=
问题描述:
已知1\a+1\b=2,则ab\2a+2b=
答
(2a+2b)/ab
=2(1/a+1/b)
=2*2
=4
已知1\a+1\b=2,则ab\2a+2b=
(2a+2b)/ab
=2(1/a+1/b)
=2*2
=4