若a+b+c=1,abc=2^-5,则1/ab+1/ac+1/bc的值为多少?
问题描述：
若a+b+c=1,abc=2^-5,则1/ab+1/ac+1/bc的值为多少?
答
1/ab+1/ac+1/bc
=c/abc+b/abc+a/abc
=(c+b+a)/abc
=1/2^-5
=2^5
=32