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c) \( (-5)^{3}= \) d) \( -5^{3}= \)

Ask by Ortega Bartlett. in Brazil
Feb 27,2025

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Answer

c) (-5)³ = -125 d) -5³ = -125

Solution

c) (-5)³ = -125 d) -5³ = -125 Explicação: Em c), os parênteses indicam que o número -5 inteiro é elevado à potência 3. Assim, (-5)³ = (-5) × (-5) × (-5) = 25 × (-5) = -125. Em d), a ausência de parênteses significa que apenas o 5 é elevado à potência 3, e o sinal de negativo é aplicado depois. Portanto, -5³ = -(5³) = -(125) = -125.

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The expression \( (-5)^{3} \) means that we are cubing -5, which involves multiplying -5 by itself three times: \( (-5) \times (-5) \times (-5) = -125 \). The negative sign is preserved because you have an odd number of negative factors. On the other hand, \( -5^{3} \) follows a different interpretation due to the absence of parentheses. Here, we first calculate \( 5^{3} \), obtaining \( 125 \), and then apply the negative sign: \( -125 \). So, despite the similar appearance, the two expressions yield the same numerical result, which is -125!

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