更新1:
5 consecutive numbers
the sum of consecutive numbers is half the middle number multiplied by 10?please may i have 3 examples and explain how?
回答 (4)
2016-09-25 4:38 pm
✔ 最佳答案
Works for any five consecutive integers.10, 11, 12, 13, 14 = 60 . Half of 12 is 6, * 10 = 60.
In general we have:
Half the middle number * 10 is the equivalent of saying the middle number * 5.
Consider five consecutive numbers:
(n-2) + (n+1) + n + (n+1) + n +2 = 5n
2016-09-25 4:37 pm
How many 'consecutive numbers ?'
2016-09-25 5:26 pm
Sum is n + (n + 1) + (n + 2) = 10(n + 1)/2
3n + 3 = 5n + 5
2n = -2
n = -1
So the three consecutive numbers are -1,0,1.
3n + 3 = 5n + 5
2n = -2
n = -1
So the three consecutive numbers are -1,0,1.
2016-09-25 4:40 pm
5
收錄日期: 2021-05-01 20:58:31
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https://hk.answers.yahoo.com/question/index?qid=20160925083332AAaLiLU