maths~~~~~

(3r - q) - (q - p/4)
= 3r - 2q + p/4
= 3p/4 - p + p/4
= 0
so, (3r - q) = (q - p/4)
p/4 ,q , 3r forms A.P.

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(r - q) - (q - p)
= r - 2q + p
= p/4 - p + p
= p/4
not equal to zero
p,q,r cannot form A.P.
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(log p - log q) - (log q - log r)
= log p - 2log q + log r
= log pr/q^2
= log 4pr / (2q)^2
= log p^2 / p^2
= log 1
= 0
so A.P.
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