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Ejercicio 6, 7y 11 Urgente porfavor?

Ejercicio 6, 7y 11 Urgente porfavor.

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Rojasanabel576
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6) Show that : a) ( 3³ - 1 ) / 2 = 3² + 3 + 1 ( 27 - 1) / 2 = 9 + 3 + 1 26 / 2 = 13 13 = 13 b) (4³ - 1 ) / 3 = 4² + 4 + 1 ( 64 - 1) / 3 = 16 + 4 + 1 63 / 3 = 21 21 = 21 c) Write a similar expression involving 5³ : (5³ - 1 ) / 4 = 5² + 5 + 1 ( 125 - 1) / 4 = 25 + 5 + 1 124 / 4 = 31 31 = 31 7) a) √4096 = √64² = 64 b) ∛4096 = ∛16³ = 16 11) Explain why Alicia is correct : A square root of 25 could be less than a square root of 16 √25 couldn't be less than √16 , because : √25 = 5 √16 = 4 √25 > √16.