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Matriz por escalar – 5 ejercicios

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Práctica rápida de escalar con matrices

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Matriz por escalar – 5 ejercicios
 

Matriz por escalar – 5 ejerciciosOnline version

Práctica rápida de escalar con matrices

by CECILIA MARGARITA AVILES JIMENEZ
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Slide 1: Introducción

Bienvenidos a la práctica de matriz por escalar. Trabajaremos con multiplicación de matrices por un número real. Cada ejercicio propone una matriz A y un escalar k.

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Ejercicio 1

Dados k = 3 y A = [[1, 2], [3, 4]]. Calcula kA. Solución rápida: multiplica cada entrada de A por k para obtener la matriz resultante.

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Ejercicio 2

Dados k = -2 y A = [[0, 5], [-1, 2]]. Calcula kA. Revisa signos y productos entre filas y columnas.

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Ejercicio 3

Dados k = 4 y A = [[-3, 7], [0, 2]]. Calcula kA. Observa que la fila con ceros permanece nula al escalar.

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Ejercicio 4

Dados k = 0 y A = [[5, -1], [4, 3]]. Calcula kA. Recuerda que cualquier matriz por 0 es la matriz nula.

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Ejercicio 5

Dados k = 1/2 y A = [[2, -4], [6, -2]]. Calcula kA. Convierte cada entrada por medio de la fracción.

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Soluciones breves (resumen)

Resultados: 1) [[3,6],[9,12]] 2) [[0,-10],[2,-4]] 3) [[-12,28],[0,8]] 4) [[0,0],[0,0]] 5) [[1,-2],[3,-1]]

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Consejos y errores comunes

Consejos: verifica signos, aplica distribución correctamente y repasa la propiedad de escalares. Errores típicos: olvidar multiplicar toda la entrada o perder signos.

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Autoevaluación rápida

5 ejercicios resueltos: ¿Podrías escribir las respuestas sin ver las soluciones? Practica 2 veces para fijarlas mejor.

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