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Is the sequence 15, 30, 45, ... arithmetic or geometric?
Determine the general term and find t20.

Supergirl  May 23, 2017
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This is an arithmetic sequence because there is a constant difference between the terms.

 

Have a look at http://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html for more details.

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Alan  May 23, 2017

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