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4 November, 17:37

In the sequence - 40, - 33, - 26, - 19, ... determine the 77th term and the sum of the first 90 terms.

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  1. 4 November, 17:48
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    The 77th term is 532 because the nth term is 7n-7

    7x77=539

    539-7=532
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