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8 January, 09:59

How do you find the sum

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Answers (2)
  1. 8 January, 10:01
    0
    Just add up the numbers given.

    unless you mean something more complex, like angles and stuffs.
  2. 8 January, 10:20
    0
    Calculate the average of the first and second term. To do this, add the two numbers, and divide by 2. Multiply the average by the number of terms in the series. This will give you the sum of the arithmetic sequence.
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