Question: 3. Data for two matrices X3.1 and Z3.3 are given as: X = matrix(c(2, 6, 1), 3, 1) Z = matrix(c(5, 3, 2, 3, 6,
3. Data for two matrices X3.1 and Z3.3 are given as:
X = matrix(c(2, 6, 1), 3, 1)
Z = matrix(c(5, 3, 2, 3, 6, 1, 2, 1, 9), 3, 3)
a. Show that Z is a symmetric matrix
b. Find inverse of matrix Z.
c. Find determinants of Z and Z inverse. Show that det(Z) is inverse of det(Z-1).
d. Find X'ZX
e. Find Z-1X
e. Find eigenvalues and eigenvectors of Z using R or Excel.
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