| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎$ E7 y  N& p; `/ n% N2 ]

" N* s9 Y: g; t7 k) O8 u(x - a) = x - a* n) e: J' r' D% F  m; t  `
(x - a) (x - b) = x^2 – ax – bx + ab
' O7 c1 G) G5 {' t4 ~(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
; A% H7 j8 b0 }3 a1 j$ |9 Y(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
2 d! `" {: Y0 C$ Y, r如此種推，4 {& Y2 V+ `' U7 Q7 z. S( t0 I
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
4 i/ v. Z% |. j& {' Q$ }& X, O5 X2 i6 T' z  P! R; [" O6 x
[ 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:
/ N5 H9 h! D5 E* U7 R* ^1 L咁難既=.="
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# R, |% u* U+ |0 i( ]! E; u4 \[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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: V3 g" P9 G; |& a+ hThanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:! C4 \! ]" F6 N& P! _

% x3 a; ?' q! T) x3 q+ K7 C7 ]  V) @6 F
(x-x)= 0 ，所以答案係0，is it?

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1 A( v$ J! J# r( B' @6 P0 ABingo~