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##

Rational function given by roots and poles : `fcoeff`

`fcoeff` has as argument a vector
whose components are the roots and poles of a rational function
*F*[*x*], each one followed by it's multiplicity.

`fcoeff` returns the rational function *F*(*x*).

Input :
`fcoeff([1,2,0,3,2,-1]) `

Output :
`(x-1)``^`

2*x`^`

3/(x-2)

giac documentation written by Renée De Graeve and Bernard Parisse