Summation Equations

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9 Terms

1
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Geometric nth term

f(1) * r^(n-1)

2
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Geometric sum

f(1) * (1-r^n)/(1-r)

3
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Arithmetic nth term

f(1) + (n-1)d

4
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Arithmetic sum

n(f(1)+f(n))/2

5
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sum of constant

n * c

6
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sum of k

n(n+1)/2

7
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sum of k²

n(n+1)(2n+1)/6

8
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sum of k³

(n(n+1)/2)²

9
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infinite sum

f(1)/(1-r)