maths

2010-07-03 11:39 pm
(X-1)(X99+X98+X97+...+X2+X+1)
In this arithmetic formula How many terms in there?
Please list the steps and reason
更新1:

index notation

回答 (3)

2010-07-04 1:17 am
✔ 最佳答案
(x - 1)(x^99 + x^98 + x^97 + ....... + x^2 + x + 1)
= (x^100 + x^99 + x^98 + ...... + x^3 + x^2 + x) - (x^99 + x^98 + x^97 + .... + x^2 + x + 1) = x^100 - 1, so there are only 2 terms.
2010-07-04 12:18 am
index notation
2010-07-03 11:45 pm
X^99 or 99X or Xˇ99


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