Solving Equations: Understand Rules & Get Help

  • Thread starter Thread starter Ry122
  • Start date Start date
Click For Summary
The discussion focuses on understanding the transition from the second to the third line in a mathematical equation. Participants seek clarification on the specific rule applied during this transformation. The concept of integration by parts is highlighted as a key method for solving the equation. There is a call for detailed explanations to ensure comprehension of the steps involved. Understanding these rules is essential for effectively solving similar equations.
Ry122
Messages
563
Reaction score
2
http://users.on.net/~rohanlal/glgl.jpg
I don't understand how the 2nd line changes to what is shown in the 3rd line.
What rule is applied here?
 
Last edited by a moderator:
Physics news on Phys.org
Use integration by parts.
 
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 14 ·
Replies
14
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 17 ·
Replies
17
Views
1K
  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 6 ·
Replies
6
Views
2K