1.观察下列个数,在括号内填入适当的数.-2,-4,0,-2,2,( ) ( )2.观察下列三行数.-3.9,-27,81,-243,729.(第一行数)3分之1,-1,3,-9,27,-81,.(第二行数)-5,7,-29,79,-245,727,.(第三行数)回答下列问题(1
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