| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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9 Y: g! ^4 {' c7 P(x - a) = x - a' M- o7 h; c& f( h& Z) v. o, P
(x - a) (x - b) = x^2 – ax – bx + ab( `8 L) ^4 e% t$ {! Z: J
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
" o1 I/ R8 {( `(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
  B, b( `* X9 x+ X3 q; A3 i如此種推，
7 H4 E+ G7 ?; p/ L: y# v8 v(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???% O( b3 l  Q" k; l  h5 l
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[ 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:
+ B2 }( o2 W) S* {7 Y咁難既=.="
0 [1 \* _/ U6 L
1 I: r+ I4 J  F8 y: Z[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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( J/ T8 x' a- |. h* y. m1 TThanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:9 `9 C- @! H7 u8 P& W# D7 @

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(x-x)= 0 ，所以答案係0，is it?

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Bingo~