Newton Joseph
02/15/2023 · Middle School

16. Calcula el vértice de \( f(x)=2 x^{2}+4 x-1 \) \( \begin{array}{lll}\text { a) }(-3 ;-1) & \text { c) }(1 ; 3) & \text { e) }(-1 ;-3) \\ \text { b) }(1 ;-3) & \text { d) }(2 ;-1) & \end{array} \)

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Para encontrar el vértice de la función cuadrática \( f(x) = 2x^2 + 4x - 1 \), podemos usar la fórmula del vértice, que se encuentra en la forma estándar de una parábola \( f(x) = ax^2 + bx + c \). El vértice \( (h, k) \) se puede calcular usando las siguientes fórmulas: \[ h = -\frac{b}{2a} \] \[ k = f(h) \] En nuestra función, tenemos: - \( a = 2 \) - \( b = 4 \) - \( c = -1 \) Primero, calculamos \( h \): \[ h = -\frac{4}{2 \cdot 2} = -\frac{4}{4} = -1 \] Ahora, sustituimos \( h \) en la función para encontrar \( k \): \[ k = f(-1) = 2(-1)^2 + 4(-1) - 1 \] \[ = 2(1) - 4 - 1 \] \[ = 2 - 4 - 1 = -3 \] Por lo tanto, el vértice de la función es \( (-1, -3) \). La respuesta correcta es: \[ \text{e) } (-1, -3) \]

Quick Answer

El vértice de la función es (-1, -3).
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