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apple_pi
 3 years ago
How do you put this into reduced row echelon form?
$$
\left[\begin{array}{rrrr}
3 & 2 & 1 & 8 \\
5 & 1 & 3 & 23 \\
4 & 1 & 5 & 18
\end{array}\right]
$$
apple_pi
 3 years ago
How do you put this into reduced row echelon form? $$ \left[\begin{array}{rrrr} 3 & 2 & 1 & 8 \\ 5 & 1 & 3 & 23 \\ 4 & 1 & 5 & 18 \end{array}\right] $$

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sami21
 3 years ago
Best ResponseYou've already chosen the best response.01) first of all divide with 3 the whole 1st row to get pivot point 1 (all other elements below it should be zero ) . 2) then subtract 4 times of row 1 from 3rd row 3) now subtract 5 times of row one from 2nd row do this and let me know that you get .

apple_pi
 3 years ago
Best ResponseYou've already chosen the best response.0ok thanks i'll work on it

sami21
 3 years ago
Best ResponseYou've already chosen the best response.0there are steps after this to carried out .. if you want to completely do this first do the above 3 steps and then will let you the further steps..

apple_pi
 3 years ago
Best ResponseYou've already chosen the best response.0So now I have $$ \left[\begin{array}{rrrr} 1 & \frac{2}{3} & \frac{1}{3} & \frac{8}{3} \\ 0 & \frac{13}{3} & \frac{14}{3} & \frac{109}{3} \\ 0 & \frac{11}{3} & \frac{11}{3} & \frac{46}{3} \end{array}\right] $$

sami21
 3 years ago
Best ResponseYou've already chosen the best response.01) ok now multiply the second row with 13/3 to get 1 at the first point 2) then subtract 11/3 times of 2nd row from the third row .

apple_pi
 3 years ago
Best ResponseYou've already chosen the best response.01) multiply? would that possibly be divide by 13/3?

sami21
 3 years ago
Best ResponseYou've already chosen the best response.0i should have written to multiply with 3/13 ... yes if you divide with 13/3 same .. end result will be 1

apple_pi
 3 years ago
Best ResponseYou've already chosen the best response.0Oh, yeah I got it from here. Thanks

sami21
 3 years ago
Best ResponseYou've already chosen the best response.0let me give you online interactive tool for free to convert matrix to reduced ech form. go here http://www.math.odu.edu/~bogacki/cgibin/lat.cgi select Transforming a matrix to reduced row echelon form (third one in list) then select 3 rows and three columns then enter the left hand part of matrix it will teach you complete steps !
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