按规律写出下面的第100个数1,4,7,10,13,16,19……
按规律写出下面的第100个数1,4,7,10,13,16,19……
数学人气:508 ℃时间:2019-08-21 14:17:00
优质解答
1 1+3 1+3*2 1+3*3 以此类推 100个应该是1+3*99=298
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