November 11th, 2017, 08:42 AM  #1 
Newbie Joined: Nov 2017 From: Mars Posts: 1 Thanks: 0  Integral problem
Hello people! I was given the following problem: "Find the integral of (x^2+1)*e^((x^2)/2)" I already know the solution (x*e^((x^2)/2)), because [f(x)g(x)]'=f'(x)g(x) + f(x)g'(x) where f(x)=e^((x^2)/2) and g(x)=x. But I was wondering if there is a "nice" method that leads to solution. I tried integrating by parts and some substitutions but I was unable to find the solution that way. Thanks for reading and have a nice day. 
November 11th, 2017, 09:20 AM  #2  
Math Team Joined: May 2013 From: The Astral plane Posts: 1,887 Thanks: 765 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
And you should stay far away from any advice Denis has. Dan  

Tags 
integral, problem 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Integral problem  jiasyuen  Calculus  9  March 5th, 2015 02:17 AM 
Integral u sub problem  austen951  Calculus  12  January 3rd, 2010 11:57 AM 
Integral problem  Polybius  Calculus  5  December 26th, 2009 05:32 AM 
Integral Problem  livingapparatus  Calculus  3  December 4th, 2007 09:18 AM 
Need help with integral problem..  Saeid  Applied Math  1  December 31st, 1969 04:00 PM 