Math

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Given: ________, – 243, – 226, – 209, – 192, – 175, …
The 67th term of the sequence is __________.
The series of the first 27 terms of the sequence is __________.

  • Math -

    looks like an arithmetic sequence with d = 17
    and term2 = -243
    a+d = -243
    a = - 260

    term(67) = a+66d
    = -260 + 66(17)
    = ...

    you should have at your finger-tips the formulas for the sum of n terms
    you have the a and the d, so plug in

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