U E D R , A S I H C RSS

새싹교실/2012/앞부분만본반



1.

3/173/183/20

2.

Linear Algebra and C programming

2.1. 1 - 3/17(Linear Algebra)

Linear Algebra
1 Linear Equations in Linear Algebra
Linear Equations Matrices ,
Linear System 명 -> Linear Equation
variable,coefficient,constant 명.

따른 Linear System

A L.S has either
1. No solution
2. exactly one solution
3. infinitely many solution


1 ->
2 ->
3 ->
명.

1 -> inconsistent
2 -> consistent

) A L.S is consistent <-> A L.S has a solution
(exactly one solution -> Only )

2.2. 1 - 3/18(Linear Algebra)

Linear System Matrix equation .

L.S <-> matrix equation
Ax=b A : coefficient matrix ( ) -> mxn -> 방 : m 미 : n

ex) let Ax=b with A: 4x5 matrix -> L.S : 방 4 , 미 5

*elimination()
-> matrix equation augmented matrix 는 뱡

따른 Elementary Equation Operations(E.E.O)(L.S and Ax=b) Elementary Row Operations(E.R.O)(A b) , .

Elementary Equation Operations(E.E.O)
1. .
2. .
3. k배(k0) .

Elementary Row Operations(E.R.O)
1. (kRi, k0)
2. (Ri<->Rj)
3. K배 .(k×Ri + Rj -> new Rj)

E.R.O는 reversible inverse E.R.O를 .
E.R.Oinverse E.R.O
kRi, k0(1/k)Ri, k0
Ri<->RjRi<->Rj
k×Ri + Rj(-k)×Ri + Rj

E.R.O를 , . .

2.3. 1 - 3/18(C programming)

1. C
2. C
3. Hello World! 들
4.
5. printf

2->
#include <stdio.h>

int main(void)
{
   printf("Hello world! \n");
   return 0;
}

3 -> 문 1. .



2. 본 , , 를 모 .(\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 를 보 . 들(25, 345, 9393) %d를 .
____ .
는 25 .
는 345 - 9393.

2 를 보 . %d를 .
7x8 = 56
3x2 = 6

2.4.


  • 는데, .
    12
    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.
    는데


    ) A L.S is consistent <-> A L.S has a solution
    (exactly one solution -> Only )
    .
    system infinitely many solutions consistent ? .-

2.5.

infinitely many solutions consistent.

A L.S has a solution 는 말 a exactly one solution
.




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