| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎( o! }% f# B. E7 b. E( c. v+ \
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(x - a) = x - a$ w8 t/ C3 [0 g( a
(x - a) (x - b) = x^2 – ax – bx + ab1 ]( g" V) O: [7 k& Y
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc/ w. g4 c# g$ u3 k
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd- T6 o. q5 v/ ~1 W6 `, N
如此種推，; L" o+ j7 }: m8 R% L; s2 |
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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" l1 e. a* S& S' h, ]( G[ 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:+ u" v- E8 {/ z* o5 i3 a+ {( W
咁難既=.="
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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- m+ W# @& ]& mThanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:
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& H  e+ p; x& v: i  }( v! H(x-x)= 0 ，所以答案係0，is it?

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+ v8 I$ g# n3 r  IBingo~