00:01
Hello everyone in this question the eigenvalues and eigenvectors have given we have to find the 3 into 3 symmetric matrix for this eigenvalues and eigenvector so the symmetric the required matrix be like this we can name the matrix as a so a equal to p d p inverse where d is the diagonal matrix with eigenvalues and p is nothing but the eigenvector matrix and p inverse is nothing but inverse of so first let us write the diagonal matrix d equal to diagonal matrix means in the diagonal we have value and other entries will be zero so i will take the diagonal values from highest to low yes that is four three one so the remaining will be zero so this is the required diagonal matrix 4 3 1 and other entries are 0.
01:15
Then p is the eigenvector matrix.
01:20
Since i have taken 4, the required matrix should be come first.
01:24
So for eigenvalue 4 we add the matrix v2 that is 1 minus 1 1 1 1.
01:30
Then for 3 minus 1 1 1 2.
01:33
Then for 1 1 1 0.
01:35
So we have got p the we have to find p in.
01:39
Then after multiplying that we will get the required matrix.
01:43
So the formula for p inverse is 1 by determinant of p, adjoint of p.
01:49
So the determinant of p will be 1 into 0 minus 2 plus 1 into 0 minus 1 plus 1 into minus 1.
01:58
Plus 1 into minus 2 minus 1.
01:59
So this gives you minus 2, minus 1, minus 3, so minus 3 minus 6...