What do you mean by saying that the whole function is irrational?
This short PDF document was the first in Google results, and it seems pretty good.
Thanks, this slipped my mind somehow.A function f(x) is said to be 'rational' if it is computable with a finite number of 'elementary operations' +,-,* and \... all other functions are said to be 'irrational'...
Then are we allowed to use irrational constants to build rational functions? I.e., if a function is a ratio of two polynomials, can the polynomials' coefficients be irrational? If no, then the document provided above is still sufficient because it shows that for .
I am asking whether rational functions can use irrational constants with respect to the OP's problem. If irrational numbers are not allowed, then the problem has been solved. Otherwise, more thought is needed, but I don't want to go there if it's not necessary.