| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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) s% D3 z+ s' L) d% L% e(x - a) = x - a
2 u, z% i+ a% m6 U(x - a) (x - b) = x^2 – ax – bx + ab
! k, @  x. c% T8 H  ^9 y! |. a- s(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc, Q! A3 f: t3 ~7 J) ^3 m
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd3 `4 [: z) ?8 ^2 M1 f' t
如此種推，, h4 c& V4 K# \% M* V7 ?- q; w0 E
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???, q- M1 _; k5 R- n. f8 j

: G. c7 U3 i* E) \( o3 R; S[ 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:
3 Y+ A, L. o+ Z* ?9 S+ s咁難既=.="
6 Q" m: i0 n5 @" ~" B+ _! a8 @0 L: ]/ [1 h  b+ t+ }" z2 t' {/ _) ~
[ 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:
0 b/ d2 K6 l& t) p- ^/ Z' C+ l% j1 w2 e+ S- f1 R' _, P

2 X  W. K% \, E6 M& B7 \% {1 P) \1 r(x-x)= 0 ，所以答案係0，is it?

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$ m  H* B/ d4 t; ^: m+ CBingo~