Arithmetic/geometric formulas
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Last updated 5:42 AM on 9/30/25
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6 Terms
1
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Arithmetic explicit
an = d(n-1) + a1
2
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Geometric recursive
a1= ; (an-1)r
3
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Geometric explicit
an = (a1)r^n-1
4
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Arithmetic recursive
a1= ; an = an-1 + d
5
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Geometric series
Sn = a1-r(an) / 1-r
6
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Arithmetic series
Sn = n(a1+an) / 2
