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Re: implicit function


FindRoot returns a list of replacement rules. All you have to do is
apply them:

In[1]:= ff[x_] := y /. FindRoot[2y == x, {y, .5}]

In[2]:= ff[.5]

Out[2]= 0.25


Phil Bonacich <bonacich at> writes:
> This is a simple problem, but one that has bedeviled me. I define
> ff[x_] := FindRoot[2y == x, {y, .5}] . I don't want "{y -> 0.25}"
> when I enter ff[.5]; I want ".25", so that I can do other things
> with the function ff. How do I get it?

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