| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎8 h3 Z& B4 I8 e1 \
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(x - a) = x - a
7 d3 x+ V8 H. j& ?(x - a) (x - b) = x^2 – ax – bx + ab! J) ^4 r  L5 P- x3 ?! U# h
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc. ~; [" P# b1 H% j
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd. [0 l$ Y( y& O7 v' c! y
如此種推，6 F2 \) G% C5 C
(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 ]

Triangel

Originally posted by 大大 at 2007-4-18 01:41 PM:1 f. i+ y- c. X+ t
咁難既=.="
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[ 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:4 [% @) n; K! n5 l
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, {# _% i7 T/ R(x-x)= 0 ，所以答案係0，is it?

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  _( v  Q: L0 RBingo~