If \( x, y, z \) is real and
\( \mathrm{P} \) \( 4 x^{2}+9 y^{2}+16...
If \( x, y, z \) is real and
\( \mathrm{P} \) \( 4 x^{2}+9 y^{2}+16 z^{2}-6 x y-12 y z-8 z x=0 \) then \( x, y, z \)
W. is in
(1) \( \mathrm{AP} \)
(2) GP
(3) \( \mathrm{HP} \)
(4) None
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