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Write the formula to find the sum of fir...

Write the formula to find the sum of first n terms of an Arithmetic progression, whose first term is a and the last term is `a_n`.

Answer

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Find the 10th term of an arithmetic progression whose first term is 'd' and common difference is 'b'.

The sum of n terms of an Arithmetic progression is S_n=2n^2+6n . Find the first term and the common difference.

Knowledge Check

  • What is the formula to find the sum of AP to n terms ?

    A
    `S_(n) = (n)/(2) [ a+ (n-1) d]`
    B
    `S_(n) = (n)/(2) [2a + nd]`
    C
    `S_(n) = (n)/(2) [ a+ (n+1) d]`
    D
    `S_(n) = (n)/(2) [ 2a+ (n-1) d]`

  • If the n-th term of an arithmetic progression a_(n) = 24 - 3n then its 2nd term is

    A
    18
    B
    15
    C
    0
    D
    2

  • If the n-th term of an arithmetic progression a_(n) = 24 - 3n, then its 2nd term is

    A
    18
    B
    15
    C
    0
    D
    2

    • Similar Questions

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    Find three consecutive terms in an arithmetic progression whose sum is 18 and sum of their square is 140.

    If the sum of the first 14 terms of an AP is 1050 and its first term is 10, find the 20th term.

    If the sum of first p terms of an A.P is equal to the sum of the first q terms , then find the first (p+q) terms .

    The sum of first 'n' terms of an arithmetic progression is 210 and sum of its first (n-1) terms is 171. If the first term 3, then write the arithmetic progression.

    Find the sum of first 24 terms of the list of numbers whose nth term is given by a_(n) = 3 + 2n

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