Sequences and Series Flashcards by John Georgiades | Brainscape

Q

Arithmetic sequence

A

An = A1 + (n-1)d

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Q

Arithmetic series

A

n n
Sn = — (A1 + An) = — (2A1 + (n - 1)d)
2 2

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Q

Geometric sequence

A

An = A1*r^(N - 1)

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Q

Finite geometric series

A

A1(1 - r^n)
Sn = ——————
1 - r

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Q

Infinite geometric series

A

A1
S = ——–
1 - r

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