Solved: Inverse Functions: Triangle Area in First Quadrant

Click For Summary
The discussion focuses on finding the area of the largest triangle in the first quadrant with two sides on the axes and a third side tangent to the curve y=e^-x. Participants suggest taking a specific value of x to determine the equation of the tangent line and where it intersects the axes. They derive a formula for the triangle's area and maximize it using derivatives. The final area calculated by participants is 2/e. The conversation concludes with a request to delete the thread.
moela
Messages
6
Reaction score
0
[SOLVED] Inverse Functions

What is the area of the largest triangle in the first quadrant with 2 sides on the axes and third side tangent to the curve y=e^-x
 
Physics news on Phys.org
just take any value of x and find the equation of the tangent line at that point, and see where it hits the x and y axes. then write a formula for that area, and maximize the formula by taking derivatives. hmmmmm... i think i got 2/e what did you get??
 
yea i got it
thanks

delete now please
 
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
2
Views
2K
  • · Replies 17 ·
Replies
17
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
4
Views
2K
  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 8 ·
Replies
8
Views
2K
Replies
13
Views
4K
  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 5 ·
Replies
5
Views
1K
  • · Replies 2 ·
Replies
2
Views
1K