帮我解一下这道数学题巧算(2/1-1)*(3/1-1)*(4/1-1)*(5/1-1)*(6/1-1)*(7/1-1)*(8/1-1)*(9/1-1)*(10/1-1)

问题描述:

帮我解一下这道数学题巧算
(2/1-1)*(3/1-1)*(4/1-1)*(5/1-1)*(6/1-1)*(7/1-1)*(8/1-1)*(9/1-1)*(10/1-1)

题目错没错啊

=(-1/2)*(-2/3)*(-3/4)*(-4/5)*(-5/6)*(-6/7)*(-7/8)*(-8/9)*(-9/10)
=-1/10