Maxima Function
binomial (x, y)
The binomial coefficient x!/(y! (x - y)!)
.
If x and y are integers, then the numerical value of the binomial
coefficient is computed.
If y, or x - y, is an integer,
the binomial coefficient is expressed as a polynomial.
Examples:
(%i1) binomial (11, 7); (%o1) 330 (%i2) 11! / 7! / (11 - 7)!; (%o2) 330 (%i3) binomial (x, 7); (x - 6) (x - 5) (x - 4) (x - 3) (x - 2) (x - 1) x (%o3) ------------------------------------------------- 5040 (%i4) binomial (x + 7, x); (x + 1) (x + 2) (x + 3) (x + 4) (x + 5) (x + 6) (x + 7) (%o4) ------------------------------------------------------- 5040 (%i5) binomial (11, y); (%o5) binomial(11, y)