We are looking for the values of the variables that make all four equations true.
![]() | Open the matrix menu and move to the editor. We will use [A] for this problem. |
![]() | [A] does not have the correct dimensions for the current problem. We need to change those dimensions to be 4x5 to hold the four equations each with four coefficients and a constant. Not seen in Figure 2 is the blinking cursor, although it was over the initial 3 at the top of the screen. |
![]() | Pressing ![]() ![]() ![]() ![]() |
![]() | In Figure 4 all of the coefficient and constant values have been entered into the matrix. Only the last three columns of the matrix are visible. We can use these to verify the entry of correct values from the problem. |
![]() | To check the values in the left columns of the matrix we use the
![]() |
![]() | Use ![]() ![]() |
![]() | Use ![]() ![]() ![]() ![]() |
![]() | Now that we have the right command, we might as well append the
command to convert the answer to fractional form just in case we need it.
Press ![]() |
![]() | Press ![]() |
![]() | With the command in place, press ![]() |
![]() | The answer, or at least the left part of the answer matrix, appears in Figure 11. The bottom row gives us cause for concern. All four of the values there are 0. We need to inspect the right portion of the answer to get the resst of the information. |
![]() | Use the ![]() |
©Roger M. Palay
Saline, MI 48176
November, 2010