If a2 = b + c, b2 = c + a, c2 = a + b, then the value of \(3\left( {\frac{1}{{a + 1}} + \frac{1}{{b + 1}} + \frac{1}{{c + 1}}} \right)\)

1
1
2
1/3
3
3
4
4

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