Dec 26, 2011 #1 Milentije Messages 47 Reaction score 0 I have problem like attached. Attachments Doc3.pdf Doc3.pdf 6.6 KB · Views: 221
Dec 26, 2011 #2 mathman Science Advisor Homework Helper Messages 8,130 Reaction score 573 Derivative with respect to what?
Dec 27, 2011 #3 Milentije Messages 47 Reaction score 0 Ok,I need to put this. dik=Vi-Xk and represents Eucleadean norm Derivative with respect to Vi.