which term of the A.P. 5, 8, 11, 14 is 320 ​

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which term of the A.P. 5, 8, 11, 14 is 320

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Anna 4 days 2021-10-10T01:28:40+00:00 2 Answers 0 views 0

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    0
    2021-10-10T01:29:57+00:00

    AP – 5, 8, 11, …

    A = 5

    cd = 8 – 5 = 3

    An = 320

    we know, An = A + (n-1)cd

                  320 = 5 + (n-1)3

                  320 = 5 + 3n -3

                  320 – 2 = 3n

                   318/3 = n

    Hence, n is 106

    0
    2021-10-10T01:30:14+00:00

    Answer:

    106

    Step-by-step explanation:

    an = 320 ; a = 5 ; d = 3

    an = a + (n-1)d

    320 = 5 + (n-1)3

    315/3 = n-1

    n-1 = 105

    Therefore, n = 106

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