| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a  w. x: ?* G9 U  Z4 F
(x - a) (x - b) = x^2 – ax – bx + ab
1 c2 M/ L- {4 L9 [0 y  l! Z: Y(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
! }8 k* ~- Y. r8 F: c9 M4 u8 c. i(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd1 [; O- O% u( ]$ E# b
如此種推，
& E) e- w- Q  M, x; ~/ q' F; o- Q(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 ]

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:7 Q# K4 Z8 h( Q% L8 Z. Y
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc9 K7 [: j! M9 k* @
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[ 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 Y7 Q7 T9 t% Z& F7 h, q3 Z6 [5 j咁難既=.="6 R) P& D0 G5 u  h+ Q) F/ G
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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) O* j3 l5 r1 N6 O, @3 |Thanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:
+ n/ J7 H/ u% D  L$ G2 ~( V第一個答中有獎
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(x-x)= 0 ，所以答案係0，is it?

大大

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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* w1 p' x" J3 h! H唔似a.math題
' O4 H7 D: b$ u+ {; {1 h似IQ題=.=" G/ j+ {* @% k  r/ l1 u+ L
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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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& C2 z. D  E/ m3 ^1 \, Z: z(x-x)= 0 ，所以答案係0，is it?

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Bingo~

waikong

我係學校個學生會單張見過8 o4 E/ k, X8 d$ M9 c3 R
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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這條問題，貼落吹水版，名副其實
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[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]