यदि (x+y-z)^2 + (y+z-x )^2 +(x-y +z)^2 =0 हो तो x+y+z � – McqOptions

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1.	यदि (x+y-z)^2 + (y+z-x )^2 +(x-y +z)^2 =0 हो तो x+y+z का मान होगा ?
A.	0
B.	6
C.	7
D.	3
Answer» B. 6

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