| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎, V- v# |+ C8 j/ k

5 U# ?; H* |. [) i2 [(x - a) = x - a; r9 \5 B# F+ ^7 j- ?- \' J  A8 m
(x - a) (x - b) = x^2 – ax – bx + ab/ ]* L3 c/ f% m( N3 Y
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc( _1 e7 \" C* U& y6 U* A; U2 V
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd8 |; \% t/ z+ [1 n
如此種推，+ e  R4 H) {* c( h3 O( `
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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# V+ `4 P0 E; M1 w; N[ 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:
$ a0 p" M1 L; |  Q. u咁難既=.="
& [1 M0 X) s& C+ r6 U! Z
  c0 u" o; x) p9 Q[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

5 R+ [* \  n. E& `: p' _, `

5 B% j* ^+ b- X) ?1 K/ S& F: n' g! \; nThanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:9 E8 f2 x. D. d! F1 N2 w) G! `

0 ^/ R1 h$ O" J4 I) S, e
- [' V" L8 J  L/ {(x-x)= 0 ，所以答案係0，is it?

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Bingo~