| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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! a6 |  U: [2 ^% ^7 P(x - a) = x - a8 z: l2 _) ]' K5 R. M" Y: `
(x - a) (x - b) = x^2 – ax – bx + ab9 u3 }2 n7 _' I; A9 X
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
3 _6 F, `  R4 g+ ~(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd5 g0 ]* B( p. ?
如此種推，
& j* @6 R4 c1 m! h6 R(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???$ \9 [( [( A/ l- r: H/ g: z

  M7 q1 X& n: z" z$ E- G' E; X[ 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:
1 Y( S! l7 z4 s% v  }咁難既=.="
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9 j5 _7 W5 T9 Z; g[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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& _: \" F5 |2 tThanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:6 Q7 G: X4 _6 p6 u
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(x-x)= 0 ，所以答案係0，is it?

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" K; A2 `5 f! \Bingo~