按规律填空:1.3,4,6,9,9,16,12,().15.36( )
人气:346 ℃ 时间:2019-12-11 18:49:12
解答
1.3,4,6,9,9,16,12,(25).15.36( 18)
奇数项:1+3=4+5=9+7=16+9=25+11=36
偶数项:
3×1=3
3×2=6
3×3=9
3×4=12
3×5=15
3×6=18
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