E[ http://upload.wikimedia.org/math/8/d/f/8dfcea29072392b3f8042d15a753d727.png] = http://upload.wikimedia.org/math/8/d/f/8dfcea29072392b3f8042d15a753d727.png
i couldn’t write the symbols here so i had to use links t show you what i meant. for the left said the linked image should be everything except the i part that is there. so only the and n should be there. the right side is correct. please help me derive the formula if you’re not sure of anything just email me so i can clarify what i want help with.