find the sum of first 25 terms of the sequence 12,23,34-.​

Question

find the sum of first 25 terms of the sequence 12,23,34…..​

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Julia 1 month 2021-08-20T11:28:08+00:00 1 Answer 1 views 0

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  1. Emma
    0
    2021-08-20T11:29:24+00:00

    Answer:

    3600

    Step-by-step explanation:

    A=12

    D=11

    An=276. (last term)€

    S=N/2(A+An)

    S=25/2(12+276)

    S=25/2(288)

    S=25*144

    S=3600

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