Re: Displaying Equations Symbolically and Numerically

*To*: mathgroup at smc.vnet.net*Subject*: [mg114778] Re: Displaying Equations Symbolically and Numerically*From*: "Nasser M. Abbasi" <nma at 12000.org>*Date*: Thu, 16 Dec 2010 05:57:20 -0500 (EST)*References*: <ieadkv$r9h$1@smc.vnet.net>*Reply-to*: nma at 12000.org

On 12/15/2010 4:51 AM, Gregory Lypny wrote: > Hello everyone, > > I would like to be able to display equations for my students in symbolic > form on the left side and with the numbers plugged in on the right side > but am not quite sure how to do it programmatically. Suppose my > equation in "symbolic" form is > > sqrt(x^(a+b)) + c ln(d/e) > > I know I can make it look like real math by having it displayed as > TraditionalForm. However, I also want to display the solution with > particular values for the variable x and the parameters a, b, c, d, and > e slotted in, something like > > sqrt(x^(a+b)) + c ln(d/e) = sqrt(9^(2+1)) + 4 ln(32/8) = answer > > to recognize that some students may be a little rusty at simplifying on > the fly. Wrapping the whole package in Manipulate would put the icing > on the cake. > > Any tips on how apply the appropriate styles would be most appreciated. > > Regards, > > Gregory > > > May be try this? using HoldForm? or some variation of this: eq = HoldForm[Sqrt[x^(a+b)]+c Log[d/e]]; eq2 = eq/.{x->9,a->2,b->1,c->4,d->32,e->8}; eq==eq2 Sqrt[x^(a+b)]+c Log[d/e]==Sqrt[9^(2+1)]+4 Log[32/8] --Nasser