If pth, qth, and rth term of ap are a, b, c, then show that (a-b) r+ (b-c) p +(c-a) q =0

If pth, qth, and rth term of ap are a, b, c, then show that (a-b) r+ (

1.	If pth, qth, and rth term of ap are a, b, c, then show that (a-b) r+ (b-c) p +(c-a) q =0
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