-2⼀5,1⼀5,-8⼀750,然后是什么?

2024-12-31 07:21:15
推荐回答(2个)
回答1:

括号里面应写11/375。

1、因为答案中分母已经确定是上一个数的一半,375,所以后面必须在这个基础上进行判断。

2、前两个数字中,分母一致,符号相反,第一个数的分子是第二个数分子的2倍。

3、后两个数字,分子一致,符号相反,第一个数的分母是第二个数分母的2倍。

找规律的方法:

找规律填数字,或者说图形找规律,开始大家都是通过一些对比发现其中的规律,可能有些数列三个数就有“规律”出现,不过并不能确定也只能算是猜。一般需要三个以上,包括前后结合对照才能确认规律。

不论是数列找规律还是图形找规律,都需要比较敏锐的观察力。尤其是一些规律藏得较深,需要胆大心细才能发现。最后在填完之后,需要前后结合检验所找的规律是否正确,以免徒劳无功。

回答2:

解析:
-2/5,1/5,-8/750,11/375

4/(-10),1/5,8/(-750),11/375

分子 4、1、8、11=>头尾相减=>7、7
分母 -10、5、-750、375=>分2组(-10,5)、(-750,375)=>每组第二项除以第一项=>-1/2,-1/2

所以答案为11/375

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