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1#
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+ I! L6 n' D$ q/ z3 i
" v6 v# ]* t2 J, M2 S! C(x - a) = x - a/ W2 |9 J; D8 ^! ]
(x - a) (x - b) = x^2 – ax – bx + ab5 y# m, R' Q8 Q
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc4 I5 E* T$ o/ Z: A" b
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
& H. O q' i: _ i如此種推,
# f4 P- G, n7 _' b8 y" d/ ?* P(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
0 _ H8 C" y4 Q i7 g* a2 i" j" |1 h& j! d
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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