ab=2,a+b=-1,则1/a+1/b=
问题描述:
ab=2,a+b=-1,则1/a+1/b=
答
解:1/a+1/b
=(a+b)/ab
=-1/2
ab=2,a+b=-1,则1/a+1/b=
解:1/a+1/b
=(a+b)/ab
=-1/2