यदि x+y+z=0 (xyz)/((x+y)(y+z)(z+x)) कि...

यदि `x+y+z=0` `(xyz)/((x+y)(y+z)(z+x))` किसके बराबर है

A

A)-1

B

B)1

C

C)xy+yz+zx

D

D)इनमे से कोई नहीं

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