Class Note for MATH 290 at KU
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This 2 page Class Notes was uploaded by an elite notetaker on Friday February 6, 2015. The Class Notes belongs to a course at Kansas taught by a professor in Fall. Since its upload, it has received 17 views.
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Date Created: 02/06/15
Matrices on the Graphing Calculator Entering a Matrix with the TI83 or TI83Plus matrix editor To enter a matrix on the TI 83 press On the TI 83 Plus go t MATRX ED 1 T and select the matrix you would like to edit Enter the number of rows then columns in your matrix Press ENTER and you will be able to enter the numerical entries into the matrix To retrieve your matrix on the Home Screen go to MATRX NAMES and select the matrix you have just entered Entering a Matrix from the home screen Although you can enter a matrix on the TI 83 Plus or TI 89 or other TI calculators using the matrix editor you may nd it more convenient to enter it on the home screen To Enter the matrix WHM gt4gtHOO 1 1 1 3 2 4 type the following sequence 2311 1113 3424 Press and you will see your matrix in the home screen Notice that the brackets enclose the rows of the matrix To input you would enter 1 2 To store this matrix with a variable name press the store key and name the matrix For example on the TI 83 you will choose a name from the matrix name menu 2311 1113M 3424 Elementary Row Operations 1 To interchange 2 rows TI 89 Math Matrix Row ops rowaap TI 83 Plus Matrx math rowaap To swap row 1 withrow 2in our matrix above enter rowaap a1 1 2 or rowaap A 1 2 ie rowaapmatrix name row number row number 2 To multiply a row by a scalar Tl 89 Use command mRow Tl 83 Plus Use command row To multiply row 1 by 2 enter mRow 72 a1 1 or row 72 A 1 ie mRowscalar matrix name row number 3 To multiply a row by a scalar and add to another row Tl 89 Use command mRowAdd Tl 83 Plus Use command row To multiply row 1 by 2 add it to row 2 and store the result in row 2 enter mRowAdd 72 a 1 1 2 or row 72 A 1 2 ie mRowAddscalar matrix name row to be multiplied row to be added to and stored in Using These Operations to Find Equivalent Matrices Note this is shown using the Tl 89 notation You would do the operations similarly on the Tl 83 or 83 Plus 1 First swap rows 1 and 2 rowaap a1 1 2 2 311 T 1113 a11113l 2311a2 3 4 2 4 HT 3 4 2 4 Notice that it is stored in a different variable It is a good idea to keep a copy of the original matrix stored in one name and all the equivalent matrices in another in case you make a mistake and have to start over 2 Add 2 times row 1 to row 2 and put it in row 2 mRowAdd 72 a2 1 2 1113 1113 a22311727 17 2gtr2gt017175a2 3424 3424 3 Add 3 times row 1 to row 3 and put in row 3 mRowAdd 73 a2 1 3 1113 1113 0223117371T3 gtT3gt017175a2 3424 014145 4 Add 1 times row 2 to row 3 and put in row 3 mRowAdd 71 a2 2 3 1113 1113 a223llilrgrggtrg gt017175a2 3424 0000
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