1,3,7,15,(),63,()·········找规律
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1,3,7,15,(),63,()·········找规律
1,3,7,15,(),63,()·········找规律
1,3,7,15,(),63,()·········找规律
.
1*2+1=3
3*2+1=7
空里填31和127
31,127
2的N次方减1
后一位数是前一位数的2倍加1,即1,3,7,15,31,63,127
2n+1的规律,后面填31 127
7.砖或砼路面块了砖及砼路面块的定义和分类。熟悉:水运工程中对砖的质量要求、检测组批原则。掌握:砼路面砖质量检验项目(外观质量、尺寸偏差、抗压
1,3,7,15,(),63,()·········找规律
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