> 数学 >
1/2(1-1/2n+1)化简,急啊!
人气:256 ℃ 时间:2020-06-15 03:31:54
解答
1/2[1-1/(2n+1)]
=1/2[(2n+1)/(2n+1)-1/(2n+1)]
=1/2[(2n+1-1)/(2n+1)]
=1/2*2n/(2n+1)
=n/(2n+1)
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版