2.1. 1 - 3/17(Linear Algebra) ¶
Linear Algebra 구
1 Linear Equations in Linear Algebra
Linear Equations Matrices 교,
Linear System -> Linear Equation
variable,coefficient,constant .
1 Linear Equations in Linear Algebra
Linear Equations Matrices 교,
Linear System -> Linear Equation
variable,coefficient,constant .
그 Linear System 고
A L.S has either
1. No solution
2. exactly one solution
3. infinitely many solution
1. No solution
2. exactly one solution
3. infinitely many solution
기
1 ->
2 ->
3 ->
.
1 ->
2 ->
3 ->
.
1 -> inconsistent
2 -> consistent 구
2 -> consistent 구
) A L.S is consistent <-> A L.S has a solution 걸
(exactly one solution 기 -> Only 꼭 )
(exactly one solution 기 -> Only 꼭 )
2.2. 1 - 3/18(Linear Algebra) ¶
Linear System 과 Matrix equation 계 .
L.S <-> matrix equation
Ax=b A : coefficient matrix (계 ) -> mxn 경 -> : m : n
Ax=b A : coefficient matrix (계 ) -> mxn 경 -> : m : n
ex) let Ax=b with A: 4x5 matrix -> L.S : 4개 , 5개
*elimination(거)
-> matrix equation 거기 augmented matrix
-> matrix equation 거기 augmented matrix
거 Elementary Equation Operations(E.E.O)(L.S and Ax=b) Elementary Row Operations(E.R.O)(A b) 교, .
| Elementary Equation Operations(E.E.O) |
| 1. 곱. |
| 2. 꾼. |
| 3. k(k≠0) . |
| Elementary Row Operations(E.R.O) |
| 1. 곱(kRｉ, k≠0) |
| 2. 꾼 (Rｉ<->Rｊ) |
| 3. K .(k×Rｉ + Rｊ -> new Rｊ) |
E.R.O reversible 그 inverse E.R.O .
| E.R.O | inverse E.R.O |
| kRｉ, k≠0 | (1/k)Rｉ, k≠0 |
| Rｉ<->Rｊ | Rｉ<->Rｊ |
| k×Rｉ + Rｊ | (-k)×Rｉ + Rｊ |
E.R.O 개고 , 그 .그고 .
2.3. 1 - 3/18(C programming) ¶
1. C 개 기
2. C 그 과
3. Hello World! 기
4. 그
5. printf 기
2. C 그 과
3. Hello World! 기
4. 그
5. printf 기
2->
#include <stdio.h>
int main(void)
{
printf("Hello world! \n");
return 0;
}
3 -> 1. 과 그 .
길
길
길
길
길
2. , , 그고 그 .(\n )
5->
#include<stdio.h>
int main(void)
{
printf("Hello Everybody \n");
printf("%d\n", 1234);
printf("%d %d\n", 10, 20);
return 0;
}
#include <stdio.h>
int main(void)
{
printf("My age: %d \n", 20);
printf("%d is my level \n", 100);
printf("Today\nmorning\neverybody\n");
}
1 결과 . (25, 345, 9393) %d .
____ .
25 고.
곳 345 - 9393.
2 결과 . %d .25 고.
곳 345 - 9393.
7x8 = 56
3x2 = 6
3x2 = 6
2.4. 곳 ¶
- 기 공겸 , .
12 교
A system of linear equation is said to be consistent if it has either one solution or infinitely many solutions; a system is inconsistent if it has no solution.고
) A L.S is consistent <-> A L.S has a solution 걸고 .
(exactly one solution 기 -> Only 꼭 )
system infinitely many solutions consistent ? 궁금 .-
