http://www.mathhelpforum.com/math-he...-tutorial.html
You can solve this via separation of variables. Look at the second paragraph in that topic, that should make it pretty clear how to solve this.
http://www.mathhelpforum.com/math-he...-tutorial.html
You can solve this via separation of variables. Look at the second paragraph in that topic, that should make it pretty clear how to solve this.