by Guest » Mon May 04, 2020 12:54 pm
Okay, since you are referring to the derivative can we assume that you have taken at least an introductory course in Calculus? If you have then you should know some basic derivative rules such as that the derivative of 2+ l1+ l2 with respect to l1 is 1, the derivative of -2- 3l1+ 2l2 with respect to l1 is -3, and the derivative of Cfg, where C is a constant f is a function if l1 and possibly other variables, g is a function of l1 and possibly other variables, with respect to l1 is C times the derivative of f times g plus C times f times the derivative of g: Cf'g+ Cfg'.