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2012届高三复习资料《世纪金榜——高中新课程全程复习方略(数学)》(张泉等编著,延边大学出版社,2010)的配套课时作业卷(五十三)最后一题是下面的一道探究创新题:
2012 senior high school review materials “Century Gold List - high school new curriculum throughout the review strategy (Mathematics)” (edited by Zhang Quan and other books, Yanbian University Press, 2010) supporting classwork volume (53) The last question is the following one Explore innovative questions: