| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎' i; Y& D, v# F  {
5 S9 ^9 ?9 u' `4 P( [' L. o7 f! ^+ Q
(x - a) = x - a8 Z5 v" `# P' T# R- @4 `
(x - a) (x - b) = x^2 – ax – bx + ab2 T; O* d0 F4 r* u8 Z" ^
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
8 Z9 ]0 _) c+ X& J2 Z( K) K(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd0 P- D. K% g  T" j
如此種推，9 E( e; `- j9 Y5 {
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???& h5 T. D  P- K( Q- q

) |5 k5 M- h3 y: k[ 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:3 E, K6 [' R& a% I. p  U
咁難既=.="8 F) J7 m5 w  w; N$ |
' B+ h5 M+ _( S- k  F7 j3 G9 _* b
[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

7 u* A3 {6 J# X' ~! I  y2 q6 g8 I+ U8 L
Thanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:
# y" ]  \1 x' e" G! I0 p- Z4 E$ d3 p; S
2 I, G2 a' f8 b) C2 B* \
(x-x)= 0 ，所以答案係0，is it?

7 Y$ P& u4 S& [0 c! z2 P0 `
) l3 y! i) `2 L6 r3 \
Bingo~