急!观察下面三行数: ①2,-4,8,-16,32,-64... ②0,-6,6,-18,30,-66... ③-1/2,1,-2,4,-8,16... (1)分别
急!观察下面三行数:①2,-4,8,-16,32,-64...②0,-6,6,-18,30,-66...③-1/2,1,-2,4,-8,16...(1)分别写出3行数的规...
急!观察下面三行数: ①2,-4,8,-16,32,-64... ②0,-6,6,-18,30,-66... ③-1/2,1,-2,4,-8,16... (1)分别写出3行数的规律 (2)取每行中第10个数的和是( )。
跪求啊!!!!!!!!!!!!!!!!明天要交!!!!!!!!!!!!!!!! 展开
跪求啊!!!!!!!!!!!!!!!!明天要交!!!!!!!!!!!!!!!! 展开
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