Question
\[ f(x) = 3x + 4 \quad g(x) = 2x - 3 \] \[ \text{Encontre: } f \circ g(x) \]
Ask by Washington Howell. in Brazil
Mar 15,2025
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\( f \circ g(x) = 6x - 5 \)
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Para encontrar \( f \circ g(x) \), primeiro substituímos \( g(x) \) na função \( f(x) \). Temos: \[ g(x) = 2x - 3 \] Agora, substituímos \( g(x) \) em \( f(x) \): \[ f(g(x)) = f(2x - 3) \] Como \( f(x) = 3x + 4 \), substituímos \( x \) por \( 2x - 3 \): \[ f(2x - 3) = 3(2x - 3) + 4 \] Agora, simplificamos: \[ = 6x - 9 + 4 \] \[ = 6x - 5 \] Portanto, a função composta \( f \circ g(x) \) é \( 6x - 5 \).