| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a+ h5 c( D, [5 a0 b: X$ N8 l: v. c
(x - a) (x - b) = x^2 – ax – bx + ab
6 {4 g  v6 a$ M$ c  J8 J+ j(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc2 j9 r  D/ |  e& y3 |7 ?
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
, q" a& u% m" z2 T如此種推，/ o; N% c( u" v0 m! b0 ^5 j* V
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???* B$ n( ?/ B: ~/ Y3 v

# K$ p; k* T. g9 y[ 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:. a* u# w! {, O. P8 l. j5 C
咁難既=.="
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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9 Z4 P+ B3 J- E4 c! Q; Q. ^Thanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:! O! q+ p0 [2 {; S  x% l2 K, h/ s
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5 y4 F* X3 l% m6 U  r(x-x)= 0 ，所以答案係0，is it?

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* X/ l; ^* F3 l" Q7 O5 bBingo~