需要算出1+x^4=0的四个复数根如下2^(1/2)*(i/2+1/2) 2^(1/2)*(1/2-i/2) 2^(1/2)*(i/2-1/2) 2^(1/2)*(-i/2-1/2)然后分解部分分式最后结果如下2^(1/2)*atan(2^(1/2)*x*(1/2-i/2))*(i/4+1/4)+2^(1/2)*atan(2^(1/2)*x*(i/2+1/2))*(1/4-i/4)+c