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2 May, 03:31

Find the common difference in the arithmetic sequence where p35 = - 9p + 4 and p28 = 5p - 17?

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  1. 2 May, 05:58
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    P (35) = - 9p + 4 = - 9 (35) + 4 = - 315 + 4 = - 311

    p (28) = 5p - 17 = 5 (28) - 17 = 140 - 17 = 123

    a + 34d = - 311

    a + 27d = 123

    7d = - 434

    d = - 62

    Therefore, the commpm difference is - 62.
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