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<b>if a,b, c, d and p are distinct real ...

if a,b, c, d and p are distinct real number such that
`(a^(2) + b^(2) + c^(2))p^(2) - 2p (ab + bc + cd) + (b^(2) + c^(2) + d^(2)) <= 0` then a, b, c, d are in

A

A.P.

B

G.P.

C

H.P.

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Here, the given condition `(a^(2) + b^(2) + c^(2)) p^(2) - 2p (ab + bc+ ca) + b^(2) + c^(2) + d^(2) <= 0`
`=> (ap - b)^(2) + (bp - c)^(2) + (cp - d)^(2) <= 0`
`∵` a square can not be negative
`:. ap - b = 0, bp - c = 0, cp - d = 0 => p = (b)/(a) = (c)/(b) = (d)/(c) =>` a, b, c, d are in G.P.
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