| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎; `  i0 m$ A4 D) ~% y

' B8 ]) q' a* T. D8 E6 g  E(x - a) = x - a# ^- Q: `& ^1 _$ u: s" n
(x - a) (x - b) = x^2 – ax – bx + ab7 r9 o* _6 a; G0 s/ w) p0 h
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
" n% W- }8 b. d, E(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd; \& O" O+ \3 C. o3 G
如此種推，0 \! z' [2 @4 p: A! `0 E9 c2 Z
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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8 C0 n/ i* k) N[ Last edited by Triangel on 2007-4-18 at 01:52 PM ]

Triangel

Originally posted by 大大 at 2007-4-18 01:41 PM:
* C# F! p: k5 V5 m咁難既=.="
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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Thanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:2 o1 R" E- ]. j% \

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4 {5 F( r) I9 m& X2 b8 s+ ^(x-x)= 0 ，所以答案係0，is it?

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Bingo~