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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
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. \; d" \/ ]. i: }! @! N9 [- h% F4 w(x - a) = x - a7 k# w1 i1 m8 T% [' T& l* \
(x - a) (x - b) = x^2 – ax – bx + ab4 w$ ?# r) O; S& o; ^
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
5 X' O) W6 o+ `2 h* j4 S! y(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
+ }+ O" ~6 A3 o. ^如此種推,3 C" B V* e! A8 u4 K) T1 d
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
# Z) @/ j; C. V% c
1 {, ^5 N" I, G% M7 `/ b j, J; c, j[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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