If the pth, qth and rth terms of an A.P. be a, b and c resp. Prove a(q–r) + b(r–p) + c(p–q) = 0.

If the pth, qth and rth terms of an A.P. be a, b and c resp. Prove a(q–r) + b(r–p) + c(p–q) = 0.

No description available