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(-1/3)^100*3^101= (-1/3)^100*3^100*3= ((-1/3)*3)^100*3= (-1)^100*3= 1*3=3
重點:有理數的有關概念:如有理數、數軸、相反數、絕對值、倒數等;有理數的運算. 難點:絕對值、有理數的運算
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