计算:1(y-x)+1/(2y-2x)

问题描述:

计算:1(y-x)+1/(2y-2x)

1/(y-x)+1/(2y-2x)=2/(2y-2x)+1/(2y-2x)=3/(2y-2x)

1(y-x)+1/(2y-2x)
=(2+1)/(2y-2x)
=3/(2y-2x)