Chapter 11- Sequences and Series Formula Memorization A2PCH
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5 Terms
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nth term of an arithmetic sequence
a1+(n-1)d
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arithmetic series
Sn=(n/2)(a1+an)
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nth term of a geometric sequence
an=(a1)(r)^n-1
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geometric series
((a1)(1-(r)^n))/(1-r)
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infinite geometric series where |r|≤1
(a1)/(1-r)
Note 
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