Suppose that for a 2 x 2 matrix A, Au = 30 for = • How is the pair (3, ū) called for a matrix A? Suppose further that the only non-zero vectors a, for which Ax be multiples of v above. = rx for some r, must • What more can you now saw about the number r = 3? Suppose further that Au-3w = i for w = Write down the general solution of the differential equation x'(t) = Ax

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Suppose that for a 2 × 2 matrix \( A \), \( A\vec{v} = 3\vec{v} \) for \( \vec{v} = \begin{bmatrix} -1 \\ -1 \end{bmatrix} \).

- How is the pair \( (3, \vec{v}) \) called for a matrix \( A \)?

Suppose further that the only non-zero vectors \( x \), for which \( Ax = rx \) for some \( r \), must be multiples of \( \vec{v} \) above.

- What more can you now say about the number \( r = 3 \)?

Suppose further that \( A\vec{w} - 3\vec{w} = \vec{v} \) for \( \vec{w} = \begin{bmatrix} -3 \\ -1 \end{bmatrix} \). Write down the general solution of the differential equation \( x'(t) = Ax \).
Transcribed Image Text:Suppose that for a 2 × 2 matrix \( A \), \( A\vec{v} = 3\vec{v} \) for \( \vec{v} = \begin{bmatrix} -1 \\ -1 \end{bmatrix} \). - How is the pair \( (3, \vec{v}) \) called for a matrix \( A \)? Suppose further that the only non-zero vectors \( x \), for which \( Ax = rx \) for some \( r \), must be multiples of \( \vec{v} \) above. - What more can you now say about the number \( r = 3 \)? Suppose further that \( A\vec{w} - 3\vec{w} = \vec{v} \) for \( \vec{w} = \begin{bmatrix} -3 \\ -1 \end{bmatrix} \). Write down the general solution of the differential equation \( x'(t) = Ax \).
Expert Solution
Solution:

Given: Av=3v for v=-1-1.

Consider the matrix A as abcd

Av=abcd-1-1=-a-b-c-d

If a+b=c+d, then a+b-1-1 or c+d-1-1

Keep a+b = c+d =3, that gives 3-1-1.

Hence, the pair 3, v is called for a matrix A.

 

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