Cannot solve very simple equation.
in [Mathematica]
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From: Andrzej Kozlowski on 20 Dec 2009 06:51 You can solve the equation with Reduce as long as you restrict it to a finite interval (or rectangle in C). E.G. N[Reduce[x^2 + 1 == 2^x && -10 < x < 10, x]] x == 0. || x == 1. || x == 4.257461914447932 Andrzej Kozlowski On 16 Dec 2009, at 20:34, Alois Steindl wrote: > negatron <lokieffect(a)gmail.com> writes: > >> NSolve[x^2 + 1 == 2^x] >> >> "Solve::tdep: "\!\(\* >> StyleBox[\"\\\"The equations appear to involve the variables to be >> solved for in an essentially non-algebraic way.\\\"\", \"MT\"]\) "" >> >> Am I forgetting something trivial here? >> > Hello, > from the Help page: > NSolve[lhs==rhs,var] > gives a list of numerical approximations to the roots of a polynomial equation. > > Although your equation looks quite simple, it isn't polynomial. > > Alois > > > -- > Alois Steindl, Tel.: +43 (1) 58801 / 32558 > Inst. for Mechanics and Mechatronics Fax.: +43 (1) 58801 / 32598 > Vienna University of Technology, A-1040 Wiedner Hauptstr. 8-10 > |