gf:=根(_Z^10*Z^10+18*Z^9*Z^9+123*_Z^8*Z^8+(-3*Z^8+420*Z^7+54*Z^6)*_Z*7+(-36*Z^7+751*Z^6+486*Z^5)*_Z ^6+(-138*Z*6+354*Z^5+1053*Z^4)*_Z^5+(3*Z*Z^6-228*Z^5-213*Z^4+162*Z^3+729*Z*Z ^2)*_Z^4+(18*Z^5-215*Z^4+2*Z^3-360*Z^2)*_Z*3+(15*Z*4+24*Z^3-41*Z^2-54*Z)*_Z^2+(-Z^4+24*Z^3-8*Z^2+54*Z-1)*_Z+4*Z^2+4*Z+1)^(1/2):
seq(系数(系列(gf,z,21),z,i),i=0..20);
|