(x1-x2)/(x1x2)=(x1-x2)[1+(1/(x1x2)]这个等式是怎么演变出来的
问题描述:
(x1-x2)/(x1x2)=(x1-x2)[1+(1/(x1x2)]这个等式是怎么演变出来的
答
演变不过来
(x1-x2)/(x1x2) = (x1-x2)[1+(1/(x1x2)]
左边 =(x1-x2)[1/(x1x2)]
右边 = (x1-x2)[(x1x2)+1/(x1x2)]
明显是不相等的 X1X2又不能是0