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Mathematics Questions & Answers

Q:
What is the difference between the explicit formula and recursive formula for sequences when would you use one over the other​
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17. \( \alpha+4=\beta-1=\gamma-3=\varphi+6 \) болса, онда \( \alpha, \beta, \gamma, \varphi \) натурал сандарының кайсысы ен үлкен болады? A) \( \alpha \) B \( \gamma \) C) \( \beta \) D) анықталмайды E) \( \varphi \)
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19 Une entreprise compte 23 salariés en fin d'année 2010. Durant l'année, le nombre de ses salariés double, mais en fin d'année, 22 salariés quittent l'entreprise. On note \( s_{n} \) le nombre de salariés fin \( 2010+n \). a) Écrire une relation de récurrence entre \( s_{n+1} \) et \( s_{n} \). b) À l'aide d'une calculatrice, calculer le nombre de salariés de proche en proche, jusqu'en fin 2020 .
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Vereenvoudig elke uitdrukking volledig: 1.2.1 \( \left(x+2 y^{2}\right)^{2} \) \( 1.2 .2 \frac{3}{x^{2}-3 x-4}-\frac{x+1}{4-x} \) \( 1.2 .3 \quad \frac{4^{x}-6.2^{2 x}}{2^{2(x+2)}} \)
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Consider the finite linear pattern: \( 20 ; 17 ; 14 ; \ldots ;-103 \) \( 3.1 \quad \) Write down the \( 4^{\text {th }} \) term of the pattern. \( 3.2 \quad \) Determine the expression for the \( n^{\text {th }} \) term. 3.3 Calculate the number of terms in the sequence. \( 3.4 \quad \) Which term is the first to have a negative value? \( 3.5 \quad \) What is the value of the \( 19^{\text {th }} \) even-valued term in the sequence?
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La taille d'un nénuphar double chaque jour. Au bout de 40 jours, il a recouvert tout l'étang. Au bout de combien de jours avait-il recouvert la moitié de l'étang?
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\( - 7 x ^ { 3 } y ^ { 3 } + 6 x ^ { 2 } y ^ { 2 } + 3 x y + 7 \)
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(b) Jika a lalah sebutan pertama dan \( r \) ialah nisbah sepunya bagi suata janjang geometri, tunjukkan bahawa hasil tambah \( n \) sebutan pertama bagi janjung itu ialah If \( a \) is the first term and \( r \) is the common ratio of a geometric progression, show that the sum of the first \( n \) terms of the prognession is \[ S_{n}=\frac{a\left(r^{3}-1\right)}{r-1} \] [3 mariah]
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\( \sum _ { i = - 2 } ^ { 3 } 2 i \)
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a) \( \sqrt{\frac{16}{25}} \)
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