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AP calculus

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The consecutive terms of an arithmetic progression are 5-x, 8, 2x. Find the common difference of the progression.

  • AP calculus - ,

    The common difference of an A.P. is constant, therefore, we can take the difference of consecutive terms and equate the values to determine x:

    2x-8 = 8 - (5-x) =>
    2x - x = 8-5+8 =>
    x = 11

    or
    common difference
    =2x-8
    = 14

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