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Консультация № 191205
30.06.2017, 04:36
0.00 руб.
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2
1
Здравствуйте! У меня возникли сложности с таким вопросом: 3. Решите систему линейных уравнений двумя способами (после решения необходимо выполнить проверку):
o по формулам Крамера;
o матричным способом.
2X1 + 3X2 - 5X3 = 7
5X1 + 11X2 - 16X3 = 21
4X1 + 3X2 - 9X3 = 9
o по формулам Крамера;
o матричным способом.
2X1 + 3X2 - 5X3 = 7
5X1 + 11X2 - 16X3 = 21
4X1 + 3X2 - 9X3 = 9
Обсуждение
30.06.2017, 09:31
общий
Адресаты:
Посмотрите примеры здесь http://www.mathprofi.ru/pravilo_kramera_matrichnyi_metod.html
Очень подробно описано, у Вас все получиться по примерам. Начинайте решать, и я с удовольствием посмотрю и подскажу, если будут ошибки.
Очень подробно описано, у Вас все получиться по примерам. Начинайте решать, и я с удовольствием посмотрю и подскажу, если будут ошибки.
30.06.2017, 23:30
общий
это ответ
Здравствуйте, asdf1234!
Пусть дана система уравнений
Решим эту систему уравнений по формулам Крамера. Имеем (для вычислений используем MS Excel)
Решим эту же систему уравнений матричным способом. Имеем (для вычислений используем MS Excel)
- основную матрицу
заданной системы уравнений
- определитель
основной матрицы заданной системы уравнений
- алгебраические дополнения элементов матрицы
- обратную матрицу
- матрицу
свободных членов заданной системы уравнений
- решение заданной системы уравнений
В результате расчётов получается, что решением заданной системы уравнений является
или 
Проверку правильности решения Вы можете выполнить самостоятельно, подставив полученные значения
в заданную систему уравнений.
Пусть дана система уравнений
Решим эту систему уравнений по формулам Крамера. Имеем (для вычислений используем MS Excel)
Решим эту же систему уравнений матричным способом. Имеем (для вычислений используем MS Excel)
- основную матрицу
заданной системы уравнений- определитель
основной матрицы заданной системы уравнений- алгебраические дополнения элементов матрицы
- обратную матрицу
- матрицу
свободных членов заданной системы уравнений- решение заданной системы уравнений
В результате расчётов получается, что решением заданной системы уравнений является
или Проверку правильности решения Вы можете выполнить самостоятельно, подставив полученные значения
в заданную систему уравнений.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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