in an A.P 21, 18, 15 =18 find the 28th term from last​

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in an A.P 21, 18, 15 ……..-18 find the 28th term from last​

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Amara 1 month 2021-08-19T23:52:07+00:00 1 Answer 0 views 0

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    2021-08-19T23:53:21+00:00

    Here.., l= -18 a= 21 n=28 d = (18-21= -3)
    T28= l-(n-1)d
    -18-(28-1)-3
    =63

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