Relation between image(A) and image(A^2+A)

Click For Summary
The discussion focuses on the relationship between the image of a matrix A and the image of the expression A^2 + A. Participants suggest that the image of A^2 + A can be expressed as a linear combination of the images of A and A^2. To formalize the approach, it is recommended to analyze specific elements from the images of A and A^2 + A. The conversation emphasizes the need for a structured comparison of the two sets. Overall, the relationship between the images requires a more rigorous examination of their properties.
Candice
Messages
2
Reaction score
0

Homework Statement


  1. What is the relation between the image of A and the image of A2 + A?

Homework Equations

The Attempt at a Solution



im (A^2 + A) for x (A^2+A) is within the image. Linear combination properties show A^2 x + A x. Not sure where to go from here
 
Physics news on Phys.org
Candice said:

Homework Statement


  1. What is the relation between the image of A and the image of A2 + A?

Homework Equations

The Attempt at a Solution



im (A^2 + A) for x (A^2+A) is within the image. Linear combination properties show A^2 x + A x. Not sure where to go from here

You need to start formalising your approach. You're really just writing down vague thoughts here!

You are asked to compare two sets. So, start by taking ##x \in Im(A)## and/or ##x \in Im(A^2 + A)## and see what you get.
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

Similar threads

  • · Replies 4 ·
Replies
4
Views
3K
Replies
2
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
9
Views
15K
  • · Replies 8 ·
Replies
8
Views
2K
Replies
18
Views
2K
Replies
5
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K