Rowe Reyes
01/13/2024 · Middle School

1) Si \( a=-4 \quad b=2 \quad c=5 \quad d=7 \) Halla el valor numérico de a) \( 3 b^{4}+8 a c-9 d \)

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Para hallar el valor numérico de la expresión \( 3 b^{4}+8 a c-9 d \) con los valores dados \( a=-4 \), \( b=2 \), \( c=5 \) y \( d=7 \), primero sustituimos los valores en la expresión. 1. Calculamos \( b^4 \): \[ b^4 = 2^4 = 16 \] 2. Sustituimos en la expresión: \[ 3 b^{4} + 8 a c - 9 d = 3(16) + 8(-4)(5) - 9(7) \] 3. Calculamos cada término: - \( 3(16) = 48 \) - \( 8(-4)(5) = -160 \) - \( -9(7) = -63 \) 4. Ahora sumamos los resultados: \[ 48 - 160 - 63 \] 5. Primero, sumamos \( 48 - 160 \): \[ 48 - 160 = -112 \] 6. Luego, sumamos \( -112 - 63 \): \[ -112 - 63 = -175 \] Por lo tanto, el valor numérico de la expresión es \( -175 \).

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El valor numérico de la expresión es \( -175 \).
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