massasas Flashcards by Jackson McCoy

Q

What is the Arith An formula

A

An = A1(n - 1)d

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Q

What is the Sum for arithmetic sequences?

A

Sn = (a1 + An)/2 All mult by n

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Q

What is the Geometric An formula

A

An = A1(r)^n-1

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Q

What is the Geometric SN formula

A

Sn = a1(1 - r^n) / 1 - r

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