1 ,2,5,10,····( ) ( )37
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1 ,2,5,10,····( ) ( )37
1 ,2,5,10,····( ) ( )37
1 ,2,5,10,····( ) ( )37
(17)(26)你可以把1看做是0×0+1=1 1×1+1=2 最后的是6×6+1=37可以看出前面两个分别是4×4+1=17 5×5+1=26 爪机党,
1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········?
计算1/(1*4)+1/(4*7)+1/(7*10)+------+1/(97*100)································································································
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(1994+1992+······+4+2)—(1+3+5+······+1991+1993)=( )
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(1+3+5++7+9······+2011)-(2+4+6+8······+2012)=
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秦始皇和汉武帝各自的功劳是?(用1·······2·······3··········来说)
1 ,2,5,10,····( ) ( )37
1+2+3+4+5+······+9999=( ) 急用
1+2+3+4+5+······+100(用简便算法)
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(2)上表中每列三个数分别是(4,3,5),(6,8,10)···(1)按规律填表4 6 8 ··· 2n ···3 8 15 ···( ) ···5 10 17 ···( )···(2)上表中每列三个数分别是(4,3,5),(6,8,10),(8,15,17)··每组数
正整数按图的规律排列,请写出第二十行,第二十一列的数 列 行 1 2 5 10 17 4 3 61118 9 8 7 12 19 急列 1 2 3 4 5行 1 2 5 10 17······················ 4 3 6 11 18······················9
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