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3.3.1: Ejercicios 3.3
https://espanol.libretexts.org/Matematicas/Precalculo_y_Trigonometria/Prec%C3%A1lculo_APEX_(Chapman%2C_Herald_y_Libertini)/03%3A_Resolver_y_funciones_trigonom%C3%A9tricas/3.03%3A_Descomposici%C3%B3n_de_fracciones_y_fracciones_parciales/3.3.1%3A_Ejercicios_3.3
$\displaystyle \frac{\phantom{x} \frac{1}{x} - \frac{x+2}{x^2} \phantom{x}}{\frac{4}{x^2} - \frac{x^2+1}{x^3}}$ $\displaystyle \frac{\phantom{x} -2x}{-x^2+4x-1 \phantom{x} }$ , $x \neq 0$ \(\disp... $\displaystyle \frac{\phantom{x} \frac{1}{x} - \frac{x+2}{x^2} \phantom{x}}{\frac{4}{x^2} - \frac{x^2+1}{x^3}}$ $\displaystyle \frac{\phantom{x} -2x}{-x^2+4x-1 \phantom{x} }$ , $x \neq 0$ $\displaystyle \frac{\phantom{x} \frac{1}{x-b} - \frac{1}{x} \phantom{x}}{b}$ $\displaystyle \frac{A}{x+2} + \frac{B}{(x+2)^2} + \frac{C}{(x+2)^3}$ $\displaystyle \frac{A}{x+1} + \frac{B}{x-1} + \frac{Cx+D}{x^2+1}$ $\displaystyle \frac{1/2}{x} + \frac{1/5}{2x-1} - \frac{1/10}{x+2}$

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