| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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9 @5 a9 k& |# f, w(x - a) = x - a* d$ ?5 S* D7 F4 z% E
(x - a) (x - b) = x^2 – ax – bx + ab
+ |1 V) R% H) _8 s7 b(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
3 @- d9 I1 g+ k3 H8 ~, x: z(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
% b3 G4 ~9 N. Q# H如此種推，
6 Z6 m( [$ Y) y( J/ i(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:) g+ ], K8 C3 m/ U4 C( p
咁難既=.="
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1 A9 p2 n" J2 W% ~, b4 Q& n# Q5 M8 |[ 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:% x+ j& V& v0 `7 I- W+ Y
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' |* m7 a  R! b(x-x)= 0 ，所以答案係0，is it?

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: M2 M8 C- z- I! w3 `" @% {Bingo~