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發表於 2007-4-18 01:26 PM
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| TriTri | A-Math 加分題 |
第一個答中有獎' W1 G N& C+ Y4 C
" T+ G$ ?; F6 i1 H/ Y" M2 [) e(x - a) = x - a
5 i4 d* Y } |* Y/ J- ~" t# Y- x0 I(x - a) (x - b) = x^2 – ax – bx + ab
1 Y* \# f3 ~$ A0 d S( O(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc3 j" y, _! r8 S/ J0 y2 p% `( y
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd# B. o# q# A% e: e) K- D' j, d
如此種推,
; ]: N) U3 |. a(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???: {5 p! g% i; d7 d- d, d1 t
/ q2 t$ D1 w6 Y8 r; v
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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