Sequences and series

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4 Terms

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Arithmetic sequence

aₙ=a₁+d(n-1)

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Arithmetic Series

Sₙ=(a₁+aₙ)n/2

3
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Geometric Sequence

aₙ=a₁*r^n-1, n≥1, n∈Natural Number

4
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Geometric Series

Finite: Sₙ=(a₁+r)^n/(1-r)

n≥1, n∈natural number

Infinite: a₁/(1-r), lim Sₙ=no sum, x—> ∞