| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a6 v( _0 [" j. r; B" \- R2 u* ]$ a
(x - a) (x - b) = x^2 – ax – bx + ab
! R; Q& {4 c8 i, ?9 W( w5 d6 Y(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc0 G4 v! _: g& V" [  x
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
* \; V- n* L( t" Z  _$ U如此種推，8 u3 k5 o; s% h$ X( e  {4 s
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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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:6 V* K, z% y4 ]9 L( O; L. o
咁難既=.="2 `# o9 Y+ C& h4 {
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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Thanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:5 X  ~7 N6 [6 i9 K- r
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; A8 I  K5 E: X1 F" [& W) C, ^8 P(x-x)= 0 ，所以答案係0，is it?

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( N3 S) t( i% L) S0 [4 tBingo~