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