Series Flashcards by Hannah Savill | Brainscape

Q

Arithmetic: U_n =

A

a + ( n - 1 ) d

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Q

Geometric: U_n =

A

ar^{n - 1}

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Q

Arithmetic: S_n =

A

n/2( 2a + (n-1)d )
n/2( a + l )

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Q

Geometric: S_n =

A

a(1-rⁿ) / 1- r

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Q

Geometric: S_∞ =

A

a/(1-r)

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