[R] Looking for package to solve for exponent using newton's method

[Jeff Newmiller]

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Sent from my phone. Please excuse my brevity.

Ken Takagi <katakagi at bu.edu> wrote:
>Hi,
>I'm looking for an R function/package that will let me solve problems
>of the
>type:
>
>13 = 2^x + 3^x.
>
>The answer to this example is x = 2, but I'm looking for solutions when
>x
>isn't so easily determined. Looking around, it seems that there is no
>algebraic solution for x, unless I'm mistaken.  Does anyone know a good
>package to solve these types of problems? Are there built in functions
>to do
>this?
>
>Thanks!
>
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