MATH問題(HElP!!!)

2009-08-07 7:47 pm
#1 (a^5-b^5)/(a-b)
#2 (a^7-1)/(a-1)
#3 (a^8+1)/(a+1)
#4 (a^6+1)/(a-1)
更新1:

教埋點做,thx (not only the answers)

回答 (1)

2009-08-08 6:34 am
✔ 最佳答案
#1 (a5 – b5)/(a – b) = a4 + a3b + a2b2 + ab3 + b4
#2 (a7 – 1)/(a – 1) = a6 + a5 + a4 + a3 + a2 + 1
#3 (a8 + 1)/(a + 1) 未能整除
#4 (a6 + 1)/(a – 1) 未能整除


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