Thread: What Integration Technique? View Single Post
 2008-04-27, 17:41 #7 frmky     Jul 2003 So Cal 22·33·19 Posts As hinted above, shift the origin by 3 to get a symmetric integral over -1 to 1. Call this integral 1. Then replace x by -x (and of course dx by -dx) and see what you get as an equivalent integral. Call this integral 2. Now add integral 1 and integral 2 to get an integral that is easier to do. Call this integral 3. Now, since integral 1 and 2 are equal, they are each 1/2 of integral 3.