P.A., P.G. e Função Exponencial Flashcards

1
Q

Condição para 3 números formarem P.A.

A

a₃ - a₂ = a₂ - a₁

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2
Q

Relação entre termos consecutivos P.A.

A

a(n) - a(n-1) = r

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3
Q

Quando a P.A. é:
Crescente
Decrescente
Constante

A

r > 0
r < 0
r = 0

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4
Q

Soma termos P.A.

A

S(n) = [(a₁ + a(n))n]/2

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5
Q

Termo geral P.A.

A

a(n) = a₁ + (n-1)r

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6
Q

Quando a função exponencial é:

a) crescente?
b) decrescente?

F(x) = a^x

A

a) a > 1

b) 0 < a < 1

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7
Q

Termo geral função exponencial

A

Q = Q₀ • (1 + taxa em decimais)^n

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8
Q

Condição para 3 termos formarem P.G.

A

a₃/a₂ = a₂/a₁

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9
Q

Termo geral P.G.

A

a(n) = a₁ • q^(n-1)

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10
Q

Soma termos P.G.

A

S(n) = (a₁ - a(n) • q)/1-q
OU
S(n) = (a₁(1 - q^n)/1-q

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11
Q

Relação entre termos consecutivos P.G.

A

a(n)/a(n-1) = q

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