Предмет: Математика, автор: nomercy1998

Помогите, ради христа. проблема на миллион. Я за вас помолюсь в церкви, отвечаю.

Приложения:

Ответы

Автор ответа: zaurberiev
0

Задание 1. Даны матрицы A,B,C.

1) В матрице A,B найти определитель;

2) Вычислить A-C

1)

7 2 4

det A = -3 9 -2 =

2 1 5

= 7·9·5 + 2·(-2)·2 + 4·(-3)·1 - 4·9·2 - 7·(-2)·1 - 2·(-3)·5 = 315 - 8 - 12 - 72 + 14 + 30 = 267

1 2 -4

det B= 6 5 1 =

-2 0 3

= 1·5·3 + 2·1·(-2) + (-4)·6·0 - (-4)·5·(-2) - 1·1·0 - 2·6·3 = 15 - 4 + 0 - 40 - 0 - 36 = -65

2) Решение и ответ на фото

Задание 2. Решить систему уравнений методом Гаусса. Решение на фото. Если подробно написать объяснение решений, это будет очень долго. И мне нравится метод Гаусса, сложно решать.

{x1 + x2 + x3 = 4

{5x1 + 3x2 + 2x3 = 1

{3x1 + 2x2 + 3x3 = -1

Ответ:

x =  -  \frac{20}{3}

y = 13

z =  \frac{7}{3}

Задание 3.

Найдите производные следующих функций:

1)y=11x⁵+11

y'=55x⁴+0=55x⁴

2)

y =  \frac{1}{7} {x}^{7} +  \frac{1}{6}  {x}^{6}  +  \frac{1}{4}  {x}^{4}  + 3 =x^{6}  + x^{5}  + x^{3}

3 и 4, я не знаю как решить( поэтому оставлю как есть

Приложения:

nomercy1998: Ай спасибо дорогуша, дай бог тебе здоровья.
zaurberiev: Спасибо, и вам тоже крепкого здоровья! Извеняюсь что не смог решить последние две с производными(
nomercy1998: да ладно, я за пятеркой не стремлюсь. сам там начеркал ей, зачет поставила.
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