RE: Entering constant placeholders

*To*: mathgroup at smc.vnet.net*Subject*: [mg32351] RE: [mg32328] Entering constant placeholders*From*: "Higinio Ramos" <higra at usal.es>*Date*: Wed, 16 Jan 2002 03:30:02 -0500 (EST)*References*: <200201150730.CAA04534@smc.vnet.net>*Reply-to*: "Higinio Ramos" <higra at usal.es>*Sender*: owner-wri-mathgroup at wolfram.com

In[3]:=Dt[a x^3 + b x^2 + c x + d, x, Constants -> {a, b, c, d}] Out[3]=\!\(c + 2\ b\ x + 3\ a\ x\^2\) Higinio ----- Original Message ----- From: progman <dglfl at home.com> To: mathgroup at smc.vnet.net Subject: [mg32351] [mg32328] Entering constant placeholders > I can't seem to make this work. When I enter the following, I get these > errors: > > SetAttributes[a,b,c, Constant] > > Syntax::tsntxi: "SetAttributes a,constant" is incomplete; more input is > needed. > > d(ax^3 + bx^2 + cx + d)/dx > > The answer should be 3ax^2+2bx+c . I can't figure out how to tell > mathematica that a,b, & c are constants. > > > > Thanks >

**References**:**Entering constant placeholders***From:*"progman" <dglfl@home.com>