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Re: Solving non linear equations
Posted:
Mar 5, 2013 4:16 AM


Please use lowercase letters, such as 'a', instead of uppercase letters for names you devise. (To avoid clashes with builtin Mathematica names, all of which begin with '$' or else an uppercase letter.) Thus you should use for your equation:
x + 1/(1 + r^x) + a == 0
Are r and a supposed to be real, or would complex values be OK? What range of values do you want for r or for a?
What makes you think there is a solution? Have you tried plotting. Look, e.g., at:
Manipulate[Plot[x+1/(1+r^x)+a,{x,10,10},AxesOrigin>{0,0}],{{r,0},10,10},{{a,0},10,10}]
On Mar 3, 2013, at 10:58 PM, Norman Polozka <normanmath@gmail.com> wrote:
> I want to solve such equation by using mathematica, > > Solve[x+1/(1+r^x)+A==0,x] > > But it says it can't solve. Any idea of solving such equations?
 Murray Eisenberg murray@math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 5491020 (H) University of Massachusetts 413 5452838 (W) 710 North Pleasant Street fax 413 5451801 Amherst, MA 010039305



