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Core mathematics

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The 4th term of an A.P.is 37 and the 6th term is 12 more than the 4th term.find the 1st and the 7th term of the sequence.

  • Core mathematics - ,

    4th term is 37 ---> a + 3d = 37

    6th term is 12 more than 4th term ---> a+5d = a+3d + 12
    2d = 12
    d = 6
    then in a+3d = 37
    a + 18 = 37
    a = 19

    first term is 19
    7th term = a+6d = 127

    check:
    19 25 31 37 43 49
    is 4th term 37 ? yes
    is 6th term 12 more than 4th? yes

  • Core mathematics - ,

    1 = 6.16 and 7= 43.12

  • Core mathematics - ,

    i think

  • Core mathematics - ,

    Reiny can u answer my other question please it is the latest one about the charity swim

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