Mathis Cervantes
07/14/2023 · Senior High School
15. Sea \( X \) una variable aleatoria continua con la siguiente función de densidad: \[ f(x)=\left\{\begin{array}{ll}a\left(4 x-x^{3}\right) & \text {; si } 0 \leq x \leq 2 \\ 0 \quad ; & \text { de lo contrario }\end{array}\right. \] Determinar el valor de \( a \)
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Para encontrar el valor de \( a \), se integra la función de densidad sobre su dominio y se iguala a 1. La integral es \( \int_{0}^{2} a(4x - x^3) \, dx = 1 \). Al calcular la integral y resolver para \( a \), se encuentra que \( a = \frac{1}{4} \).
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