Fórmulas P.A. e P.G. Flashcards

1
Q

Termo geral de uma P.A

A

Aₙ = Aₙ + R.(n -1)

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2
Q

Soma de PA

A

Sₙ = (A₁ + Aₙ).n/2

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3
Q

P.A. de 3 termos

A

(x-r, x ,x+r). Média aritmética.

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4
Q

Termo geral de uma P.G.

A

An = A₁ . qⁿ ⁻ ¹

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5
Q

Soma de uma P.G. finita

A

Sₙ = A₁(qⁿ - 1)/q - 1

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6
Q

Soma de uma P.G. infinita

A

Sₙ = A₁/1 - q

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7
Q

P.G. de 3 termos

A

(x/q, x, x.q). Média geométrica.

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