| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a: g- u8 b5 q% }6 g5 y
(x - a) (x - b) = x^2 – ax – bx + ab
: H% g$ z' n  u; J! _, n$ F* e(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
, G6 U4 ?8 A9 v0 @5 Y- I% M(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd' R0 {" m. E6 M* ?, V
如此種推，
4 F6 K' ~% K" T: A) T; y) m. b(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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2 ~/ L; Y- }  W4 R5 i' ^[ Last edited by Triangel on 2007-4-18 at 01:52 PM ]

大大

點解你個問題好似有d問題
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Originally posted by Triangel at 2007-4-18 01:26 PM:5 ~" c2 l2 E- |2 h. W
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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7 D4 C$ V& ^1 E' V[ Last edited by 大大 on 2007-4-18 at 01:54 PM ]

Triangel

Originally posted by 大大 at 2007-4-18 01:41 PM:2 X3 G- ?4 ?5 {7 ~
咁難既=.="
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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4 k, P2 r# c, \" n: L- ~9 xThanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:* z+ ]- u  u  Y8 {% }0 d8 ]; z5 i
第一個答中有獎9 j& E" }$ m0 R2 D  r  ^, {' ]

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3 q; X2 s7 ~2 L: j* C/ J; _9 [* A(x-x)= 0 ，所以答案係0，is it?

大大

Originally posted by littlenic at 2007-4-18 01:54 PM:; @# g1 o2 D  ~8 s

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/ W0 h/ ]( M: c: J) D(x-x)= 0 ，所以答案係0，is it?

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唔似a.math題% x9 O  r2 M( J1 k( O8 C
似IQ題=.=
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[ Last edited by 大大 on 2007-4-18 at 01:57 PM ]

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:
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(x-x)= 0 ，所以答案係0，is it?

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# n9 J) M% M. fBingo~

waikong

我係學校個學生會單張見過
4 f0 E6 s3 K, a諗左一陣先諗到

playbr2

我吾識答啊http://i72.photobucket.com/albums/i162/xcopy/Monkey/049.gif~~~ http://i72.photobucket.com/albums/i162/xcopy/Monkey/022.gif

karen0123

(哭)~~~~~其實我都知係0.........
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8 D# }" k4 E& V8 `這條問題，貼落吹水版，名副其實% ~% g6 `5 X4 ~" V  J3 v: A; h7 e

4 Y- y& A3 h0 i' H/ I$ ^[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]