若ab=2(a+b),bc=3(b+c),ac=4(a+c),求1⼀a+1⼀b+1⼀c的值

2025-04-03 10:53:19
推荐回答(1个)
回答1:

1/2=1/a+1/b 1/3=1/b+1/c 1/4=1/a+1/c
1/a+1/b+1/c=1/2(1/2+1/3+1/4)
= 13/24