求满足下列条件的实数x,y的值:(x/1-i)+(y/1-2i)=5/1-3i

1个回答

  • 先把分式化简:

    x/(1-i)上下同时乘以(1+i)得(x(1+i))/2

    y/(1-2i)上下同时乘以(1+2i)得(y(1+2i))/5

    5/(1-3i)上下同时乘以(1+3i)得(1+3i)/2

    所以(x(1+i))/2+(y(1+2i))/5=(1+3i)/2

    方程两边乘以10得:

    5x(1+i)+2y(1+2i)=5(1+3i)

    化简后得:

    5x+2y-5+5xi+4yi-15i=0

    所以得出方程组:

    5x+2y-5=0

    5x+4y-15=0

    所以x=-1,y=5