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若數列a1,a2 ,a3,...,a2012中....
Jun 14th 2013, 02:40

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若數列a1,a2 ,a3,...,a2012中每一項皆為0,1, −1 ,2或− 2，則a1 × a2 × a3 ×...× a2012之值有幾種可能? 答案給的是4027,但(-2)^2012和(2)^2012的值不是一樣嗎?...
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