SOLUTION: Determine whether it is the series arithmetic or geometris and find the sum 2+ 4+ 6+ 8+...;20th term

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Question 70311This question is from textbook Advanced Algebra
: Determine whether it is the series arithmetic or geometris and find the sum 2+ 4+ 6+ 8+...;20th term This question is from textbook Advanced Algebra

Answer by stanbon(75887) About Me  (Show Source):
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Determine whether it is the series arithmetic or geometris and find the sum 2+ 4+ 6+ 8+...;20th term
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It is arithmetic because there is a constant difference between successive terms.
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the constant difference is d=2.
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The 20th term = 1st term + 19*d
20th = 2 + 19(2)
=40
Cheers,
Stan H.