A.maths (urgent)

2008-01-13 10:15 pm
1.2+2.3+3.4+...+n.(n+1)=(1/3)n(n+1)(n+2)& 1+2+3+…+n=(1/2)n(n+1) are true for all positive integers n.
Find the value of 1+(1+2)+(1+2+3)+…+(1+2+3+…+100)

回答 (1)

2008-01-13 11:21 pm
✔ 最佳答案
Solution:

圖片參考:http://hk.geocities.com/stevieg_1023/q1.gif


圖片參考:http://hk.geocities.com/stevieg_1023/q2.gif


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