How many terms of the A.P. 7, 11, 15, 19_____ must be taken to get the sum 297?

Question

How many terms of the A.P. 7, 11, 15, 19_____ must be taken to get the sum 297?

in progress 0
Maria 1 month 2021-08-22T23:11:28+00:00 1 Answer 0 views 0

Answers ( )

  1. Ava
    0
    2021-08-22T23:12:47+00:00

    Answer:

    Let the number of terms be ‘n’

    n/2(2×7(n-1)4)=297

    n(7+2n-2)=297

    2n^2+5n-297=0

    2n^2+27n-22n-297=0

    n(2n-27)-11(2n-27)=0

    (n-11)(2n-27)=0

    n=11 or n=27/2

    Required number of terms=11

    If you like answer, please mark it as brainliest.

    I hope you will love this answer.

    If you have any doubts,ask me.

    Follow and thank me.

    Your friend-

    Sahil kumar

Leave an answer

Browse
Browse

18:9+8+9*3-7:3-1*13 = ? ( )