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13.1E: Sequências e suas notações (exercícios)

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    1. Escreva os primeiros quatro termos da sequência definida pela fórmula recursiva\(a_{1}=2, \quad a_{n}=a_{n-1}+n .\)

    2. Avalie\(\frac{6 !}{(5-3) ! 3 !}\).

    3. Escreva os primeiros quatro termos da sequência definida pela fórmula explícita\(a_{n}=10^{n}+3\).

    4. Escreva os primeiros quatro termos da sequência definida pela fórmula explícita\(a_{n}=\frac{n !}{n(n+1)}\)