Exponential and logarithmic properties

Click For Summary
SUMMARY

The discussion focuses on solving the equation 1180 = 98t + 1080e^(-t/10) for the variable t, which presents a challenge due to the presence of t both inside and outside an exponential function. The key insight provided is the application of Lambert's W function, which is defined as the inverse of the function f(x) = x * e^x. This function is essential for addressing equations of this form, as it allows for the manipulation and solution of such transcendental equations.

PREREQUISITES
  • Understanding of exponential functions and their properties
  • Familiarity with transcendental equations
  • Basic knowledge of Lambert's W function
  • Experience with algebraic manipulation of equations
NEXT STEPS
  • Research the properties and applications of Lambert's W function
  • Explore methods for solving transcendental equations
  • Learn about numerical methods for approximating solutions
  • Study examples of equations that can be solved using Lambert's W function
USEFUL FOR

Mathematicians, students studying calculus or differential equations, and anyone interested in solving complex exponential equations.

fisico
Messages
28
Reaction score
0
Hi. I'm having trouble solving for t:

1180 = 98t + 1080e^(-t/10)

I know basic properties but I think I am not remembering some idea or specific property to be able to solve this. Thank you for any help.
 
Physics news on Phys.org
Since the variable, t, appears both "inside" an exponential and "outside" there is no elementary function that will reduce that equation. You might look at "Lambert's W function" (check
http://en.wikipedia.org/wiki/Lambert's_W_function) which is defined[\b] as the inverse of the function f(x)= xex.
A variation of that will "solve" your equation.
 

Similar threads

Replies
4
Views
3K
  • · Replies 12 ·
Replies
12
Views
2K
Replies
8
Views
2K
Replies
5
Views
3K
  • · Replies 22 ·
Replies
22
Views
3K
  • · Replies 35 ·
2
Replies
35
Views
4K
Replies
13
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K
Replies
4
Views
2K