UNIVERSITAS ISLAM NEGERI MAULANA MALIK IBRAHIM MALANG

FAKULTAS SAINS DAN TEKNOLOGI

JURUSAN TEKNIK INFORMATIKA

NAMA : ZULFA ULINNUHA

NIM : 220605110075

MATA KULIAH : LINEAR ALGEBRA

KELAS : LINEAR ALGEBRA - C

DOSEN PENGAMPU : Prof. Dr. Suhartono M.Kom

library(matlib)
x <- matrix(c(5,-4,-1,1),2,2,TRUE)
y <- c(-10,2)
showEqn(x,y)
##  5*x1 - 4*x2  =  -10 
## -1*x1 + 1*x2  =    2

#MENEMUKAN NILAI X

Solve(x,y)
## x1    =  -2 
##   x2  =   0
plotEqn(x,y) #untuk SPL dengan 2 variabel
## 5*x[1] - 4*x[2]  =  -10 
##  -x[1]   + x[2]  =    2

echelon(x,y)
##      [,1] [,2] [,3]
## [1,]    1    0   -2
## [2,]    0    1    0
echelon(x,y, verbose=TRUE)
## 
## Initial matrix:
##      [,1] [,2] [,3]
## [1,]    5   -4  -10
## [2,]   -1    1    2
## 
## row: 1 
## 
##  multiply row 1 by 0.2 
##      [,1] [,2] [,3]
## [1,]    1 -0.8   -2
## [2,]   -1  1.0    2
## 
##  multiply row 1 by 1 and add to row 2 
##      [,1] [,2] [,3]
## [1,]    1 -0.8   -2
## [2,]    0  0.2    0
## 
## row: 2 
## 
##  multiply row 2 by 5 
##      [,1] [,2] [,3]
## [1,]    1 -0.8   -2
## [2,]    0  1.0    0
## 
##  multiply row 2 by 0.8 and add to row 1 
##      [,1] [,2] [,3]
## [1,]    1    0   -2
## [2,]    0    1    0

```