00:01
In this question, we have been given a matrix a, one, zero, minus three, first row, two, one, four, second row, minus two, minus four, four, third row.
00:31
We need to find the inverse of this matrix, a inverse.
00:35
So to find the a inverse, first we multiply this matrix with high identity matrix.
00:48
So we write matrix a 1, 0, minus 3, 2, 1, 4, 4.
00:59
Minus 2 minus 4 4 multiply 1 0 0 0 0 0 0 0 0 0 1 so first we apply r2 equal to r2 minus 2 r1 so we apply this transformation and we get r2 r2 minus 2 r1 1 0 minus 3 0 1 10 minus 2 0 1 10 minus 2 minus 4 4 and 1 0 0 0 0 1 then we apply r 3 r 3 plus r 3 plus 2 r1 1 0 minus 3 0 110 0 minus 4 minus 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0...