1.

If x≠0,x≠0, y≠0y≠0 and z≠0z≠0 and 1x21x2 + 1y21y2 + 1z21z2 = 1xy1xy + 1yz1yz + 1zx1zx then the relation among x, y, z is?

A. x + y + y = 0
B. x + y = z
C. 1x+1y+1z=01x+1y+1z=01x+1y+1z=01x+1y+1z=01x+1y+1z=01x+1y+1z=01x+1y+1z=01x+1y+1z=01x1x11xx+1y1y11yy+1z1z11zz=01x+1y+1z=0
D. x = y = z
Answer» B. x + y = z


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