| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎% l# e  [' R' s! S+ g- T+ X9 g1 X

. e+ H3 M9 E' `$ ]5 c' c* l! D(x - a) = x - a/ e- P3 z' k8 `/ m
(x - a) (x - b) = x^2 – ax – bx + ab$ a* Q, M' O; f
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
( i6 g$ U& s- ^7 S(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd" Q7 y4 I0 t4 e+ k! g2 M
如此種推，, G* q2 ]" W8 I3 ^
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
3 f+ w  ], z, W, x$ d( L  q" X9 X# M6 b7 A' o: H8 w
[ 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:
% W+ [, B7 q. P1 V- f2 [+ u3 j咁難既=.="
7 ?" [+ N. T0 L+ h3 n+ j+ i8 B/ [% G7 l
[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

3 x7 c2 X# A. W. }. m5 f3 s

( W; S7 [4 f" G6 }Thanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:
3 b* T& |8 G! U) K2 \( C$ P
. }& O2 k) O, Q5 \* a) |/ E; g, m9 N# t; k
(x-x)= 0 ，所以答案係0，is it?

/ S& w" H) \: f" |: g

$ c6 e2 A; f1 QBingo~