(x2-x1)+ (x1-x2/x1x2) 怎样变形到(x2-x1)(1-1/x1x2)
问题描述:
(x2-x1)+ (x1-x2/x1x2) 怎样变形到(x2-x1)(1-1/x1x2)
(x2-x1)+ x1-x2/x1x2 怎样变形到 (x2-x1)(1-1/x1x2)?
答
(x2-x1)+ x1-x2/x1x2 =(x2-x1)-x2-x1/x1x2=(x2-x1)(1-1/x1x2)