设两个分数为x、y,得
x-y=x/y
xy-y²=x
x(y-1)=y²
x=y²/(y-1)
即当两个分数满足x=y²/(y-1)时,它们的差等于它们的商
例如:y=1/2时,x=(1/2)²/(1/2-1)=-1/2,-1/2-1/2=-1/2÷1/2=-1
设两个分数为x、y,得
x-y=x/y
xy-y²=x
x(y-1)=y²
x=y²/(y-1)
即当两个分数满足x=y²/(y-1)时,它们的差等于它们的商
例如:y=1/2时,x=(1/2)²/(1/2-1)=-1/2,-1/2-1/2=-1/2÷1/2=-1