- 帖子
- 24445
- 精華
- 3
- 威望
- 10006
- 魅力
- 459
- 讚好
- 0
- 性別
- 女
|
1#
發表於 2007-4-18 01:26 PM
| 只看該作者
| TriTri | A-Math 加分題 |
第一個答中有獎
/ ^, z) Y4 `$ B2 h. y1 M& Q0 ^7 G9 ^. R: S" O% J+ I
(x - a) = x - a
% c- D+ c d" w- t4 o( @$ a(x - a) (x - b) = x^2 – ax – bx + ab, Q7 \: I" Y* |, T9 @6 _
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
. Z' V/ Q. B4 h0 w$ Y1 x(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd) S+ C0 @8 _2 _$ o' o: q
如此種推,! ~& V0 B; b" P/ f
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???! Z" P3 d9 ]1 M+ V5 X# G: l- z5 l
! K) R' e6 a, N/ K! ?$ [
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
|