If a ,b ,c ,da n dp are distinct real nu...

If `a ,b ,c ,da n dp` are distinct real numbers such that `(a^2+b^2+c^2)p^2-2(a b+b c+c d)p+(b^2+c^2+d^2)lt=0,` then prove that `a ,b ,c , d` are in G.P.

A

A.P

B

G.P

C

H.P

D

none of these

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The correct Answer is:

B

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