> 数学 >
怎么简便怎么算 1/1×1/2+1/2×1/3+1/3×1/4+1/4×1/5+……1/49×1/50
人气:260 ℃ 时间:2020-04-06 20:45:03
解答
1/1×1/2+1/2×1/3+1/3×1/4+1/4×1/5+……1/49×1/50
=(1-1/2)+(1/2-1/3)+.+(1/49-1/50)
=1-1/50
=49/50
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版