Re: transcendental equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg71395] Re: transcendental equation*From*: Bill Rowe <readnewsciv at sbcglobal.net>*Date*: Thu, 16 Nov 2006 00:54:09 -0500 (EST)

On 11/15/06 at 6:45 AM, dimmechan at yahoo.com (dimitris) wrote: >Why Solve cannot deal with the following transcendental equation? > >Solve[{2^x + 4^y == 9, x == y}, {x, y}] Because Solve simply isn't designed to address transcendental equations efficiently if at all. Simply accept this as a limitation of Solve. This particular equation is dealt with quite efficiently using FindRoot, i.e. In[3]:= FindRoot[2^x + 4^x == 9, {x, 1.5}] Out[3]= {x->1.34561} Given there are tools in Mathematica that can deal with such equations, why worry that one particular tool doesn't work well? -- To reply via email subtract one hundred and four