Calculating the Area of a Rectangle: 400Root & 800Root

  • Context: Undergrad 
  • Thread starter Thread starter abia ubong
  • Start date Start date
  • Tags Tags
    Area Rectangle
Click For Summary

Discussion Overview

The discussion revolves around calculating the area of a rectangle with sides defined by power towers involving roots and exponentiation, specifically using the 400th and 800th roots of 400 and 800, respectively. The conversation explores the convergence of these power towers and seeks to express the area in whole numbers rather than in exponential form.

Discussion Character

  • Exploratory
  • Mathematical reasoning
  • Debate/contested

Main Points Raised

  • One participant asks how to find the area of a rectangle with sides defined by the continuous exponentiation of 400 and 800.
  • Another participant questions the meaning of the ellipsis ("...") and suggests evaluating the expression as a product of power towers.
  • A different participant raises the question of whether the sequence converges, indicating uncertainty about the behavior of the power towers.
  • One participant references MathWorld's page on power towers to find the convergence interval, implying that the infinite superpower of 400 and 800 may have limits.
  • Another participant provides an approximation for the 400th root of 400 and suggests it is within the range of convergence.
  • A subsequent post expresses the area in terms of Lambert W-functions, proposing that the area can be calculated as a product of two such expressions.
  • Several participants express confusion and request further explanations regarding the concepts of power towers and Lambert W-functions.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the convergence of the power towers or the method to express the area in whole numbers. Multiple competing views and uncertainties remain regarding the calculations and definitions involved.

Contextual Notes

Limitations include potential missing assumptions about the convergence of the power towers and the definitions of the mathematical expressions involved. The discussion does not resolve these issues.

abia ubong
Messages
70
Reaction score
0
how do i find the area of a rectanglewith sides 400root of 400 raised continously to itself like x^x^x^..and 800root of 800 raised also to itself continouslylike y^y^y...
leave answer in whole number not exponent
 
Mathematics news on Phys.org
What do those "..." mean...?I can assume you'd have to evaluate

[tex]400^{400^{400^{...}}}\cdot 800^{800^{800^{...}}}[/tex]

Daniel.
 
Do you have any reason to think that such a sequence converges?
 
Read mathworld's page on the power tower.I'm sure u'll find the upper limit for the convergence interval,that is,of course,if u meant the infinite superpower of 400 and 800 respectively.

Daniel.
 
Abia, consistent no doubt. I think you mean a power tower like:

"The 400'th root of 400"

[tex]\sqrt[400]{400}\approx 1.01509[/tex]

I think that's in the range of convergence.

Edit: The 800 one too for that matter. :smile:
 
Last edited:
area of rectangle with length x^x^x^x^x...
and breath y^y^y^y^y^y... where x is 400^ 1/400 and y is 800^ 1/800.
leaving answer in whole number not decimal or exponent
 
abia ubong said:
leaving answer in whole number not decimal or exponent

Hello Abia. Yea, leaving it in whole numbers . . . hum . . . how about expressing the power towers in terms of Lambert W-functions (which can be done and in whole numbers), and in this way then the area is just a product of two such expressions.
 
do not understand
pls explain
 
mathelord said:
do not understand
pls explain

Check out Power Towers, and Lambert W-functions in MathWorld. Try that first.
 

Similar threads

  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 21 ·
Replies
21
Views
4K
  • · Replies 5 ·
Replies
5
Views
4K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
14
Views
2K
  • · Replies 2 ·
Replies
2
Views
5K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 24 ·
Replies
24
Views
4K