| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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3 E+ v4 k5 l9 l2 O, Y( c(x - a) = x - a* z1 t7 n1 V) C5 X- l! W2 z
(x - a) (x - b) = x^2 – ax – bx + ab; y' U' Q9 \4 _) @/ _
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc: O( Q7 r! R; a4 E" N5 Z3 S
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd3 v5 b+ m' u+ l; }
如此種推，' j2 k* ]9 P9 [" d$ h$ z5 s  J
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???3 T3 _  P9 Z# g3 f+ d. r5 p
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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:
  C- ]5 C7 r+ n. }1 y(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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. r0 G6 y- F5 V  h- t[ 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:5 p% B/ _( n8 |3 ~; F! w0 g
咁難既=.="
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* z9 Q! e, M& f9 o* N0 Y3 c  X. p[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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Thanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:
* _- g- T( l% Z4 Z- U& z; ]" Q  q第一個答中有獎
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(x - ...

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' r8 Q3 M2 O1 y(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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2 I  W' x" f" T: P唔似a.math題- C. r: j$ K! ], R& U3 m# j
似IQ題=.=
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6 D% S  k% c- n[ 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:3 Y  }" d) z2 p( b# k7 _$ _

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(x-x)= 0 ，所以答案係0，is it?

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waikong

我係學校個學生會單張見過4 W& e5 ~8 ~( F" w; `
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( ~: E- Y% A# j6 Y

) F1 U' w2 j: T4 L7 t5 |: B& ?$ I  u[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]