188k views
4 votes
Find the inverse of the following matrix A, A^-1, if possible. Check that AA^-1=I and A^-1 A=I.

Find the inverse of the following matrix A, A^-1, if possible. Check that AA^-1=I-example-1

1 Answer

4 votes

The Determinant of this matrix must be different from 0 so that its inverse can be found

So we calculate The determinant

this is the matrix on a general form

We apply a equation to find Determinant

The equation

And we replace for our case

then


(-4\cdot-4\cdot4)+(0\cdot0\cdot0)+(-4\cdot-4\cdot-4)-(0\cdot-4\cdot-4)-(-4\cdot0\cdot-4)-(-4\cdot-4\cdot0)

and solve, first parethesis


\begin{gathered} 64+0-64-0-0-0 \\ =0 \end{gathered}

this determinant is zero so the matrix has no inverse matrix

The inverse of the matrix A is no possible

Find the inverse of the following matrix A, A^-1, if possible. Check that AA^-1=I-example-1
Find the inverse of the following matrix A, A^-1, if possible. Check that AA^-1=I-example-2
User Ovidiu Ionut
by
7.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories