42,30,20,18,12,(),4,6,8,10括号中应填什么?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 20:03:34
![42,30,20,18,12,(),4,6,8,10括号中应填什么?](/uploads/image/z/214797-21-7.jpg?t=42%2C30%2C20%2C18%2C12%2C%EF%BC%88%EF%BC%89%2C4%2C6%2C8%2C10%E6%8B%AC%E5%8F%B7%E4%B8%AD%E5%BA%94%E5%A1%AB%E4%BB%80%E4%B9%88%3F)
42,30,20,18,12,(),4,6,8,10括号中应填什么?
42,30,20,18,12,(),4,6,8,10括号中应填什么?
42,30,20,18,12,(),4,6,8,10括号中应填什么?
满足两个条件:①数列各项为三个质数乘积;②从第一项到最后一项,三个质数之和应越来越小.
42=7×3×2
30=5×3×2
20=5×2×2
18=3×3×2
12=3×2×2
8=2×2×2