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If sum of n terms in an A.P is ((5n^2)/2...

If sum of `n` terms in an A.P is `((5n^2)/2+(3n)/2)` then find its 20th term

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Explore conceptually related problems

(i) The sum of the first n terms of an AP is ((5n^(2))/(2) + (3n)/(2)) . Find the nth term and the 20th term of this AP. (ii) The sum of the first n terms of an AP is ((3n^(2))/(2) + (5n)/(2)). Find its nth term and the 25th term.

If the sum of n terms of an AP is n^2-2n then find its n^(th) term

Knowledge Check

  • If for every n in N , sum to n terms of an A.P. is 5n^(2)+7n then is 10th term is

    A
    `7//2`
    B
    570
    C
    102
    D
    52

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

    A
    123
    B
    118
    C
    109
    D
    107

    • Similar Questions

    Explore conceptually related problems

    (a) The sum of 'n' terms of a progression is n(n + 1). Prove that it is an A..P. Also find its 10th term. (b) The sum of 'n' terms of a progression is (3n^(2) - 5n). Prove that it is an A.P. (c) If the sum of n terms of a series is (5n^(2) + 3n) then find its first five terms.

    If the sum of the first n terms of an A.P.is (1)/(2)(3n^(2)+7n), then find its nth term.Hence write its 20 th term.

    If the sum of n terms of an A.P is (4n^(2)-3n)/(4) then ,n^(th) term of the A.P

    If S_(n) the sum of first n terms of an AP is given by 2n^(2)+n, then find its nth term.

    The sum of n terms of an A.P. is n^(2) + 3n . Find its 20th term.

    The sum of n terms of an AP is 3n^2+5n ,then find its 16th term.

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