1.

Find the common difference of the terms of A.P. (x – y), (x + y), (x + 3y), ……………

Answer»

Given terms of A.P = (x – y), (x + y), (x + 3y) 

then common difference = difference of successive terms 

= (x + y) – (x – y) = x + y – x + y = 2y 

∴ Common difference of given AP = 2y



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