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6.3.4 coef

coef(poly,deg[,var])
:: polyvar (省略時は主変数) に関する deg 次の係数.

return
多項式
poly
多項式
var
不定元
deg
自然数

 
[0] A = (x+y+z)^3;
x^3+(3*y+3*z)*x^2+(3*y^2+6*z*y+3*z^2)*x+y^3+3*z*y^2+3*z^2*y+z^3
[1] coef(A,1,y);
3*x^2+6*z*x+3*z^2
[2] coef(A,0);
y^3+3*z*y^2+3*z^2*y+z^3

参照
6.3.1 var, 6.3.5 deg, mindeg.



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