Answers

  • Brainly User
2014-11-22T21:06:39+05:30
Write them in this way,  \frac{1}{a} + \frac{1}{b} = \frac{1}{2},  \frac{1}{b} + \frac{1}{c} = \frac{1}{4},  \frac{1}{c} + \frac{1}{a} = \frac{1}{5}. Add them up,  \frac{1}{a} + \frac{1}{b} +  \frac{1}{c} = \frac{1}{2}(19/20). Then you have, a=40/9, b=40/11, c=-40. Hence, a+b+c=-40(79/99)
0