he eigen value of ⎡⎣⎢111111111⎤⎦⎥[111111111] are A. 0,0,0 B. 0,0,1 C. 0,0,3 D. 1,1,1
Question
he eigen value of ⎡⎣⎢111111111⎤⎦⎥[111111111] are A. 0,0,0 B. 0,0,1 C. 0,0,3 D. 1,1,1
Solution
The eigenvalues of a matrix are found by solving the characteristic equation, which is given by det(A - λI) = 0, where A is the matrix, λ are the eigenvalues, I is the identity matrix, and det denotes the determinant of a matrix.
The given matrix is:
A = [1 1 1] [1 1 1] [1 1 1]
Subtract λI from A:
A - λI = [1-λ 1 1] [1 1-λ 1] [1 1 1-λ]
Now, we find the determinant of A - λI and set it equal to zero:
det(A - λI) = (1-λ)[(1-λ)(1-λ) - (1)(1)] - 1[(1)(1) - (1)(1)] + 1[(1)(1) - (1)(1)] = (1-λ)[(1-λ)^2 - 1] = (1-λ)[1 - 2λ + λ^2 - 1] = (1-λ)(λ^2 - 2λ) = λ^3 - 3λ^2 + 2λ
Setting this equal to zero gives the characteristic equation:
λ^3 - 3λ^2 + 2λ = 0
Solving this cubic equation will give the eigenvalues of the matrix. The solutions to this equation are λ = 0, λ = 0, and λ = 3. Therefore, the eigenvalues of the given matrix are 0, 0, and 3. So, the correct answer is C. 0,0,3.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.