solve this problem need urgent please
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Let A be the first term of the A.P. and D be the common difference of the A.P.
Given that,
a = pth term
Therefore, b = qth term
Therefore, c = rth term
Therefore,
LHS = (a-b)r +(b-c)p + (c-a)q
= ar - br + bp - cp + cq - aq
= -(aq - ar) - (br - bp) - (cp - cq)
= - [a(q - r)+ b(r - p) + c(p - q)]
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