Victor_Guzman_correccion C8.docx

Victor_Guzman_correccion C8.docx - Operaciones con...

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Operaciones con expresiones algebraicas. Victor Guzman Núñez Nivelación matemática Instituto IACC 19-03-2019
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Adjunte aquí los desarrollos de cada ejercicio según secuencia numérica Es correcto, se asignan 1,5 puntos
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Corrección Pregunta 1: Determine el dominio y resuelva 2 x x 2 1 + x x + 1 Solución para el Dominio: Se descartan los valores de x que hacen cero los denominadores. x 2 1 ; x = ± 1 Por lo tanto, el dominio de la expresión son los números reales, sin considerar el 1 y el -1 IR { 1 , 1 } Solución a la suma de fracciones: 2 x ( x 1 ) ( x + 1 ) + x ( x 1 ) ( x 1 ) ( x + 1 ) = 2 x + x 2 x ( x 1 ) ( x + 1 ) = x 2 + x ( x 1 ) ( x + 1 ) = x ( x + 1 ) ( x 1 ) ( x + 1 ) = x ( x 1 ) Se asignan 0,5/1,5 puntos. Faltó desarrollar Es correcto, se asignan 1,5 puntos
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Es correcto, se asignan 1,5 puntos Corrección Pregunta 5: Determine el dominio y luego resuelva la expresión x 2 ( x 2 9 ) x 2 4 ( 2 x 4 ) ÷ x
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  • Fall '19
  • 2x, Número, Fracción, 18 de marzo, Instituto IACC, Victor Guzman Núñez

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