1/a+1/b=1⑴1/b+1/c=6⑵1/c+1/a=3⑶

题目详情

1/a+1/b=1⑴ 1/b+1/c=6⑵ 1/c+1/a=3⑶

▼优质解答

答案和解析

(1)+(2)+(3)
2(1/a+1/b+1/c)=10
1/a+1/b+1/c=5 (4)
(4)-(2),1/a=-1
(4)-(3),1/b=2
(4)-(1),1/c=4
所以
a=-1/2
b=1/2
c=1/4

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