Summers Vaughan
10/10/2024 · Middle School
\( y ^ { \prime \prime } - 2 y ^ { \prime } - 3 y = 4 e ^ { x } - 9 \)
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Para resolver la ecuación diferencial \( y'' - 2y' - 3y = 4e^x - 9 \), primero hallamos la solución general de la ecuación homogénea \( y'' - 2y' - 3y = 0 \), que es \( y_h = C_1 e^{3x} + C_2 e^{-x} \). Luego, para la parte no homogénea, elegimos una solución particular \( y_p = Ae^x + B \) y obtenemos \( A = -1 \) y \( B = 3 \), por lo que \( y_p = -e^x + 3 \). La solución general es \( y = C_1 e^{3x} + C_2 e^{-x} - e^x + 3 \).
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