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2 March, 13:45

In a sixth term of an arithmetic progression is 37 and the sum of the first six terms is 147, find the first term and the 15th term

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  1. 2 March, 15:46
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    The sixth term of an arithmetic progression is 37

    ---> a+5d = 37

    5d = 37-a

    sum of the first six term is 147

    ---> (6/2) (2a + 5d) = 147

    3 (2a + 37-a) = 147

    a + 37 = 49

    a = 12

    d = 5
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