If \( x^{18}=y^{21}=z^{28} \), then \( 3,3 \log _{y} x, 3 \log _{z} y, 7 \log _{x} z \) are in
(... VIDEO
If \( x^{18}=y^{21}=z^{28} \), then \( 3,3 \log _{y} x, 3 \log _{z} y, 7 \log _{x} z \) are in
(A) A.P.
(B) G.P.
(C) H.P.
(D) none of these
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