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8. \( g(x)=\left\{\begin{array}{c}3, x \leq 2 \\ \frac{x}{2}+3, x>2\end{array}\right. \)

Ask by Young Murray. in Mexico
Jan 23,2025

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La función \( g(x) \) es una función a trozos definida como: \[ g(x) = \begin{cases} 3, & \text{si } x \leq 2 \\ \frac{x}{2} + 3, & \text{si } x > 2 \end{cases} \] **Características**: - **Dominio**: Todos los números reales. - **Rango**: Todos los números mayores o iguales a 3. - **Punto de transición en \( x = 2 \)**: La función salta de 3 a 4, lo que indica una discontinuidad. - **Gráfica**: Una línea horizontal en \( y = 3 \) para \( x \leq 2 \) y una línea recta con pendiente \( \frac{1}{2} \) para \( x > 2 \). Esta función es constante para valores de \( x \) menores o iguales a 2 y aumenta linealmente para valores mayores.

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The Deep Dive

The function \( g(x) \) is defined as a piecewise function, which means it has different expressions based on the value of \( x \). For values of \( x \) that are less than or equal to 2, \( g(x) \) outputs a constant value of 3. However, for values greater than 2, \( g(x) \) transforms into a linear function, gradually increasing as it takes on larger values of \( x \). This kind of function can model situations where a certain condition holds true only within a certain range. When graphing this function, you'll see a horizontal line at \( y = 3 \) up until \( x = 2 \), where the function jumps to the linear equation \( y = \frac{x}{2} + 3 \). It’s crucial to remember that when graphing piecewise functions, attention must be paid to whether the endpoints are included (closed dots) or not (open dots). A common mistake is to forget that at \( x = 2 \), the function is still defined as 3 rather than transitioning to the linear part.

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