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19楼: Originally posted by wangxinling at 2012-08-28 21:03:26
a1,b1,c1,d1,a2,b2,c2,d2,a3,b3,c3,d3为未知数。
d1==1,
a1+b1+c1+d1==0,
a2+b2+c2+d2==0,
8*a2+4*b2+2*c2+d2==0,
8*a3+4*b3+2*c3+d3==0,
27*a3+9*b3+3*c3+d3==0,
c1=0,
3*a1+2*b1+c1==3*a2+2*b2+c2,
12* ...