| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎0 T3 |8 B! F+ D& I1 {

, [- F$ _, ~* _# c% r" H2 K7 t(x - a) = x - a
  Y8 v3 b/ e1 l(x - a) (x - b) = x^2 – ax – bx + ab
$ N" j' |- p' c; h, ^' y# Q$ v(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc, _, ?- H( m2 I& u3 G
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
0 |# M9 F% ]' K如此種推，
& U1 H; P6 E1 R8 R6 Y( k' h8 m# _: `(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
; \9 @. ^0 D$ w5 {, T+ f- Z8 u$ j7 ~: ]
[ 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:/ e( X" r7 n9 i' c( i+ X7 U
咁難既=.="
7 M. F$ L& ~- c* L/ Y
: s$ o9 X" K  G7 I" t[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

1 ]$ a( R: z9 r( P$ l6 Y8 y' {

0 J1 d6 Q, ^8 yThanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:
2 {. t; o0 b) ]* y+ I8 r5 ?. W* y
9 ]6 v4 e( l+ F- \+ o$ E7 e3 D: d2 d7 ~# h
(x-x)= 0 ，所以答案係0，is it?

- ~) w% W) q' {6 K5 b4 p
! I3 g/ m! U" S$ y4 G! b3 eBingo~