Question

How do you find an inverse matrix on an inspire?

Answer 1

To find the inverse of a square matrix, type in the matrix or its variable name and press $Iv,$type $1,$ and press: If you get an error dimension error message, the matrix is not square: if you get and error singular matrix massage one row of the matrix is multiple of another row.

Complete step by step solution:
First, make sure that your matrix is $''square''$. That means, it must be $2\times 2\,or\,3\times 3\,or\,4\times 4.$ then, press the math templates button $($to the right of the number$9$, and to left of the $'$book'$$$$) and access the correct shape of the matrix you with to enter

2 & -3 \\\ 1 & 4 \\\ \end{matrix} \right]}^{-1}}$$ $$\Rightarrow \left[ \begin{matrix} \dfrac{4}{11} & \dfrac{3}{11} \\\ \dfrac{-1}{11} & \dfrac{2}{11} \\\ \end{matrix} \right]$$ The first possible matrix template is for $$a$$ $$e\times 2$$ matrix. That is what is selected to enter my example matrix that you also see on the screen. If you wish to enter a $$3\times 3$$ or larger square matrix, you will select the last matrix template shape $$({{6}^{th}}$$icon from the left, or the one just to the left of the sigma rotation$$).$$ Now, see the image above to see the $$2\times 2$$ matrix and its inverse that I typed into my TI Inspire, you will finish entering the four numbers inside the brackets, the press the $$\wedge $$ button$$,$$ followed by $$-1.$$ this does not mean the $$-1$$ power, it does not mean the reciprocal, in the context of a matrix, this symbol mean inverse. **Note:** Always make sure while using inspire follows and knows all steps of calculating suppose if you get the error. Of mension error massary, or suppose the matrix is not square. Then a singular matrix message one row of matrix is a multiple of another row.