Gardner Matthews
10/19/2024 · Middle School
3. Indicar el numerador de el resultado: \( A=\frac{2}{x^{2}-y^{2}}+\frac{1}{x^{2}+y^{2}+2 x y}+\frac{1}{x^{2}+y^{2}-2 x y} \) Dar como respuesta la raíz cuadrada del numerador: \( \begin{array}{lll}\text { a) } x & \text { b) } 2 x & \text { c) } 3 x \\ \text { d) } 2 x^{2} & \text { e) N.A. }\end{array} \) 4. Si: \( \frac{2}{x+2}+\frac{5}{x+3} \equiv \frac{a x+b}{(x+2)(x+3)} \) \( \begin{array}{lll}\text { Calcular: } A=a \cdot \text { b) } 111 & \text { b) } 112 & \text { c) } 113 \\ \text { d) } 114 & \text { e) N.A. } & \end{array} \)
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### Parte 3
La raíz cuadrada del numerador es \( 2x \).
### Parte 4
La respuesta correcta es b) 112.
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