On which interval is the function f(x) = 3 sin(2x) decreasing?Responses
Question
On which interval is the function f(x) = 3 sin(2x) decreasing?Responses
Solution
Para determinar en qué intervalo la función está decreciendo, debemos seguir estos pasos:
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Encontrar la derivada de la función: La derivada de con respecto a es:
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Determinar cuándo la derivada es negativa: La función está decreciendo cuando su derivada es negativa, es decir, cuando : Simplificando, obtenemos:
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Encontrar los valores de para los cuales : La función es negativa en los intervalos donde el ángulo está en los cuadrantes segundo y tercero del círculo unitario. Esto ocurre cuando: Dividiendo todo por 2 para resolver para :
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Generalizar para todos los ciclos de la función seno: La función seno es periódica con un período de para , lo que significa que debemos considerar todos los intervalos donde es negativo. Esto se puede expresar como:
Por lo tanto, la función está decreciendo en los intervalos:
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