| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎2 x5 Q$ X* M/ X$ ~' Y- T! K  o* i
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(x - a) = x - a
2 `' J! L' Y# U(x - a) (x - b) = x^2 – ax – bx + ab
( T  P7 F& E0 u4 U" Q6 N(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
. a6 o9 G- K/ q: E(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
% y* H0 J% |* e如此種推，
$ [; E* x( g, a' e+ V5 c(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???2 R8 @* [) u2 U" N& ?! j
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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:$ E9 |9 s2 T% c5 n
咁難既=.="  w* Z; _: h% A, O" J% z$ T% m' u

7 [! ]# O( g4 S8 H( j[ 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 v, B* Q- M. b% s9 g) s

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2 G6 S* U8 J; t2 G; Z  a& `(x-x)= 0 ，所以答案係0，is it?

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* g6 R! N; v. `5 BBingo~