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21 November, 11:48

Super Duper Urgent!

Find the sum of the summation of 2 i minus 12, from i equals 7 to 16.

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Answers (2)
  1. 21 November, 13:53
    0
    Sigma (i = 7 to 16, 2i-12) = 2*sigma (i = 7 to 16, i) - 120

    = 2*115-120 = 110
  2. 21 November, 15:19
    0
    The correct answer is 110
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