Series, Maths Flashcards by Ava Gifford-Moore | Brainscape

Q

Sum for n terms in an arithmetic series

A

n/2(2a+(n-1)d) = n/2(a+an)

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Q

Sum for n terms of a geometric series

A

a(r^n-1)/(r-1)

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Q

Sum to infinite terms of a geometric series

A

a/1-r

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Q

General term of an arithmetic series

A

a+(n-1)d

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