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ddobtn

2007-09-28 2:20 am

w is the smallest among three consecutive number , find their sum.

回答 (1)

Teddy

2007-09-28 2:24 am

✔ 最佳答案

If w is the smallest number, the next two consecutive number must be w+1 and w+2
Thus,
Sum = w + (w+1) + (w+2)
= w + w + 1 + w + 2
= 3w + 3
= 3(w+1)

2007-09-28 00:35:21 補充：
如果 w 是三個連續數中最小的話其餘兩個必定是 w 1 和 w 2於是...三個數的總和 = w w 1 w 2= 3w 3抽 common factor= 3(w 1)

參考: I am a Maths tutor

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