The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its

The common difference of the A.P. $$\frac{1}{3},$$ $$\frac{{1 - 3b}}{3},$$  $$\frac{{1 - 6b}}{3},$$   . . . . . . is

If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum of (p + q) terms will be

If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms is 273, then the third term is :

If the first, second and last term of an A.P. are a, b and 2a respectively, its sum is

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