x2 -x1 + (x1-x2)/x1x2 怎么化成(x2 -x1)*(1 - 1/x1x2)
问题描述:
x2 -x1 + (x1-x2)/x1x2 怎么化成(x2 -x1)*(1 - 1/x1x2)
答
x2 -x1 + (x1-x2)/x1x2
=(x2-x1)-(x2-x1)/(x1x2)
=(x2-x1)(1-1/x1x2)
=(x2 -x1)*(1 - 1/x1x2)