11'3 Arithmetic Series

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11.3 Arithmetic Series
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Essential Question

• How do I find the sum of the first n terms of an
  arithmetic series?

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Sum of the First n Terms of an Arithmetic
Series The sum, Sn, of the first n terms of an
arithmetic series whose first term is t1 and
whose nth term is tn is given by
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Find the sum of the first n terms of an
arithmetic series.
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