(1-2)X(2-3)x(3-4)X(4-5)X…X(99-100)=?

问题描述:

(1-2)X(2-3)x(3-4)X(4-5)X…X(99-100)=?

-1

(1-2)X(2-3)x(3-4)X(4-5)X…X(99-100)
=(-1)X(-1)X(-1)X(-1)X...X(-1)
99
=(-1) 【(-1)的九十九次方】
=-1