Re: Re: Non-algebraic solution

*To*: mathgroup at smc.vnet.net*Subject*: [mg52457] Re: [mg52421] Re: [mg52399] Non-algebraic solution*From*: "B.Ravinder" <ravi at crest.ernet.in>*Date*: Sun, 28 Nov 2004 01:06:37 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

But the problem in my case is that a, b, c, d are Non-integer number. On Fri, 26 Nov 2004, DrBob wrote: > It can be solved and plotted for some values of the parameters. > > For instance: > > Clear[x, y] > Block[{a = 3, > b = 2, c = 1, d = 4, equation = Log[y/a] + b*Log[c + y/d] == -x}, > Solve[equation, y] > ]; > y[x_] = y /. First@% > Plot[y@x, {x, -25, 10}] > > Bobby > > On Fri, 26 Nov 2004 01:04:27 -0500 (EST), B.Ravinder <ravi at crest.ernet.in> wrote: > > > Dear all, > > I want to plot the following type of logarithmic equation having > > dependent variable y and independent variable x. > > > > Log[y/a] + b*Log[c+y/d] = -x > > > > where a,b,c and d are some arbitrary constants. > > > > First I tried to solve the equation for y using Solve function in > > Mathematica 4.2, but got the following error > > message: > > Solve:: tdep : > > The equations appear to involve the variables to be solved > > for in an essentially non-algebraic way. > > > > > > Could someone please guide me as to how do we solve such equation > > with/without Mathematica. > > or > > If possible, how to obtain y vs. x plot in Mathematica without soving them > > exactly. > > Waiting for the kind resonse. > > > > Regards, > > Ravi > > > > > > > > > > > >