【答案】
解答:奇數(shù)項(xiàng)構(gòu)成數(shù)列1,3,5,7,…,每一項(xiàng)比前一項(xiàng)多2;偶數(shù)項(xiàng)構(gòu)成數(shù)列4,8,12,…,每一項(xiàng)比前一項(xiàng)多4,所以應(yīng)填:16”
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