My Math Forum expanding E

 Linear Algebra Linear Algebra Math Forum

 November 28th, 2016, 11:51 AM #1 Member   Joined: Nov 2016 From: Ireland Posts: 67 Thanks: 2 expanding E (e^2x + e^x) (e^-2x + e^-x) = 2 + e^x + e^-x Why's the answer to this, not 3 ? It's seems to multiply out through the rest of the equation why not at the end?
November 28th, 2016, 11:57 AM   #2
Math Team

Joined: May 2013
From: The Astral plane

Posts: 1,557
Thanks: 598

Math Focus: Wibbly wobbly timey-wimey stuff.
Quote:
 Originally Posted by Kevineamon (e^2x + e^x) (e^-2x + e^-x) = 2 + e^x + e^-x Why's the answer to this, not 3 ? It's seems to multiply out through the rest of the equation why not at the end?
Are you saying $\displaystyle e^x + e^{-x} = 1$? You are adding, not multiplying.

-Dan

 November 28th, 2016, 12:16 PM #3 Member   Joined: Nov 2016 From: Ireland Posts: 67 Thanks: 2 Ahhh well then maybe that's it... I calculated it to e^0 which is 1. How are you doing the super script btw?
November 28th, 2016, 12:33 PM   #4
Math Team

Joined: Jul 2011
From: Texas

Posts: 2,548
Thanks: 1259

Quote:
 Originally Posted by Kevineamon How are you doing the super script btw?
LaTex Help - My Math Forum

 November 28th, 2016, 01:54 PM #5 Member   Joined: Nov 2016 From: Ireland Posts: 67 Thanks: 2 $\displaystyle e^x + e^{-x} = 1$
 November 28th, 2016, 01:56 PM #6 Member   Joined: Nov 2016 From: Ireland Posts: 67 Thanks: 2 I see display style ... Does it appear correctly to you guys?
 November 28th, 2016, 02:07 PM #7 Member   Joined: Nov 2016 From: Ireland Posts: 67 Thanks: 2 oh never mind refreshed it and it appeared correctly

 Tags expanding

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post mikeinitaly Algebra 6 April 20th, 2015 12:51 AM link107 Algebra 3 February 19th, 2012 10:10 PM rgarcia128 Calculus 5 September 27th, 2011 10:59 PM everettjsj2 Calculus 2 February 28th, 2010 02:49 PM johnny Algebra 10 August 9th, 2007 07:59 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top