Re: implicit differentiation

*To*: mathgroup at smc.vnet.net*Subject*: [mg2883] Re: [mg2858] implicit differentiation*From*: Lou Talman <me at talmanl.mscd.edu>*Date*: Thu, 4 Jan 1996 03:05:29 -0500

An alternative to Dave Wagner's use of Dt to implement implicit differentiation is to make the dependence explicit: In[1]:= imp[u_, v_] := Log[v] + u v - 1 In[2]:= Map[D[#, x]&, imp[x, y[x]] == 0] Out[2]= y'[x] y[x] + x y'[x] + ----- == 0 y[x] In[3]:= Solve[%, y'[x]] Out[3]= 2 y[x] {{y'[x] -> -(----------)}} 1 + x y[x] --Lou Talman ------------------------------- Begin forwarded message: >From: marshall at CIS.Edu.HK >Subject: [mg2858] implicit differentiation How can I do implicit differentiation ? ==== [MESSAGE SEPARATOR] ====