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Ifthe equations a(y +z) =x,b(z+x) = y, ...

Ifthe equations `a(y +z) =x,b(z+x) = y, c (x + y) = z` have nontrivial solutions, then `1/(1+a)+1/(1+b)+1/(1+c)=`

A

`(3)/(2)`

B

3

C

`(1)/(2)`

D

2

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The correct Answer is:
D
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