数学证明题（轮换对称式）求证a^2/(b+c+d)+b^2/(c+d+a)c^2/(d+a+b)+d^2/(a+b+c)=7B-7设a,b是方程x^2-3x+1=0的两个根,c,d是方程x^2-4x+2=0的两个根,已知a/(b+c+d)+b/(c+d+a)+c/(d+a+b)+d/(a+b+c)=B求证a^2/(b+c+d)+b^2/(c+d+a)c^2/(d+a+b)+d^2/(a+b+c)=7B-7
2019-05-27
数学证明题（轮换对称式）求证a^2/(b+c+d)+b^2/(c+d+a)c^2/(d+a+b)+d^2/(a+b+c)=7B-7
设a,b是方程x^2-3x+1=0的两个根,c,d是方程x^2-4x+2=0的两个根,
已知a/(b+c+d)+b/(c+d+a)+c/(d+a+b)+d/(a+b+c)=B
求证a^2/(b+c+d)+b^2/(c+d+a)c^2/(d+a+b)+d^2/(a+b+c)=7B-7
