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Sum of first n Terms of an AP...

Sum of first n Terms of an AP

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If the sum of first n terms of an A.P. is 3n^(2)-2n , then its 19th term is

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The sum of first n terms of an A.P. is 5n ^(2)+ 4n, its common difference is :

Sum of first n terms of an A.P. whose last term is l and common difference is d, is

If the sum of first n terms of an A.P. is given by S=3n^(2)+4n. Determine the A.P. and the n^(th) term.

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If S_(n) the sum of first n terms of an A.P. is given by Sn = 3n^(2) - 4n , find the nth term.

The sum of first n terms of an A.P is given by 3n^(2)+6n The 22 nd term of the A.p.is