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高中數學題目
Dec 25th 2013, 02:34

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1 24x^3 - 14x^2 - 11x+6=0 , x=? Sol 24x^3 - 14x^2 - 11x+6=0 (24x^2+16x^2)+( - 30x^2 - 20x)+(9x+6)=0 (8x^2 - 10x+3)(3x+2)=0 (4x+1)(2x - 3)(2x+3)=0 x= - 1/4 or x=3/2 orx= - 3/2 2 三次多項式 f(x) 除以 x^2+x+2 的餘式為 x+2 ,除以 x^2+x - 2 的餘式為 5x - 2 ,求 f(x) Sol x^2+x<sep/>...
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