My Math Forum  

Go Back   My Math Forum > High School Math Forum > Algebra

Algebra Pre-Algebra and Basic Algebra Math Forum


Reply
 
LinkBack Thread Tools Display Modes
March 25th, 2014, 01:11 PM   #1
Senior Member
 
Joined: Sep 2009

Posts: 251
Thanks: 0

Solve multiple term exponential

If I take the log of both sides, I get rid of the e on the right, but then I'm stuck with an ln on the left. How do I solve this?



What I tried?



Seems no better off than the start.

P.S. Calculator not allowed
Singularity is offline  
 
March 25th, 2014, 01:34 PM   #2
Global Moderator
 
Joined: May 2007

Posts: 6,641
Thanks: 625

Re: Solve multiple term exponential

There is no exact solution.
mathman is offline  
March 25th, 2014, 01:37 PM   #3
Senior Member
 
Joined: Sep 2009

Posts: 251
Thanks: 0

Re: Solve multiple term exponential

Really? There must be an exact solution.
Singularity is offline  
March 26th, 2014, 08:11 AM   #4
Global Moderator
 
Joined: Dec 2006

Posts: 19,952
Thanks: 1842

The equation is equivalent to 18e^1.2 = (0.006x + 1.2)e^(0.006x + 1.2),
so x = W(18e^1.2)/0.006 - 200, where W denotes the Lambert W function.
skipjack is offline  
Reply

  My Math Forum > High School Math Forum > Algebra

Tags
exponential, multiple, solve, term



Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Solve the exponential equation Arnhus Algebra 1 September 12th, 2013 11:16 AM
Im not sure how to solve this exponential equation.. RealMadrid Algebra 2 April 17th, 2012 04:10 PM
Solve exponential equation MIDI Elementary Math 9 October 19th, 2010 01:04 PM
solve exponential sum bert.mymathforum Calculus 6 May 21st, 2009 06:56 AM
help! solve exponential functions 1love Calculus 0 December 31st, 1969 04:00 PM





Copyright © 2018 My Math Forum. All rights reserved.