x分之x+1除x方分之x方-1,化简,
问题描述:
x分之x+1除x方分之x方-1,化简,
答
x分之x+1除x方分之x方-1
=x分之x+1乘以x方-1分之x方
=x分之x+1乘以(x+1)/(x-1) 分之x方
化简,得
x(x-1)