coefficient(A,X,D)

The coefficient command computes the coefficient of X^D in a polynomial A.

Examples

f = 3*x^2 + 5*x + 7;
coefficient(f,x,2);
	3

g = 3*x*y + 4*x^2*y + 1;
coefficient(g,y,1);
	3*x+4*x^2