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If a ^(2) = by + cz, b ^(2)= cz + ax, c ...

If `a ^(2) = by + cz, b ^(2)= cz + ax, c ^(2) = ax + by, ` then the value of `(x)/(a + x) +(y)/(b + y) + (z)/(c + z)` is

A

`a+b+c`

B

3

C

1

D

0

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