2,7,17,37,77,( ),( )
人气:273 ℃ 时间:2020-04-20 12:25:31
解答
答案:2,7,17,37,77 ,( 157 ) ,(317)
规律:
17=7+5×2
37=17+10×2
77=37+20×2
157=77+40×2
317=157+80×2
.
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