Algebra II Sequences and Series Terms and Equations
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5 Terms
1
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a_{n}=a_1+d\cdot\left(n-1\right)
Equation for Arithmetic Sequences
2
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a_{n}=a_1\cdot r^{n-1}
Equation for Geometric Sequences
3
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S_{n}=\frac{n}{2}\left(a_1+a_{n}\right)
Equation for Arithmetic Series
4
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S_{n}=\frac{a1-a_{n}\cdot r^{}}{1-r}
Equation for Geometric Series (an)
5
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S_{n}=\frac{a1-a1\cdot r^{n}}{1-r}
Equation for Geometric Series (a1)