1) -2,4,-8,16,-32,642)0,6,-6,18,-30,66分别写出各组第n个数计算出各组中第8个数的和
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![1) -2,4,-8,16,-32,642)0,6,-6,18,-30,66分别写出各组第n个数计算出各组中第8个数的和](/uploads/image/z/3182819-59-9.jpg?t=1%29+-2%2C4%2C-8%2C16%2C-32%2C642%290%2C6%2C-6%2C18%2C-30%2C66%E5%88%86%E5%88%AB%E5%86%99%E5%87%BA%E5%90%84%E7%BB%84%E7%AC%ACn%E4%B8%AA%E6%95%B0%E8%AE%A1%E7%AE%97%E5%87%BA%E5%90%84%E7%BB%84%E4%B8%AD%E7%AC%AC8%E4%B8%AA%E6%95%B0%E7%9A%84%E5%92%8C)
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1) -2,4,-8,16,-32,642)0,6,-6,18,-30,66分别写出各组第n个数计算出各组中第8个数的和
1) -2,4,-8,16,-32,64
2)0,6,-6,18,-30,66
分别写出各组第n个数
计算出各组中第8个数的和
1) -2,4,-8,16,-32,642)0,6,-6,18,-30,66分别写出各组第n个数计算出各组中第8个数的和
找规律?
1)-128
2)-126
数列题???
(1)公比是-2
(2)+6,-12,+24,-48‘‘’’
问题是什么
1) -2,4,-8,16,-32,64,(-128)
2)0,6,-6,18,-30,66,(-126)
(1)-2 4 -8 16 -32 64 -128 256 -512 1024 -2048 4096 -80192...(2)+6,-12,+24,-48‘‘’’
什么意思?求完整题目
1):-2的n次方,n为1,2,3,4,5......(正整数)
第二题不懂~~
1)
收起
64+32+16+8+4+2+1怎么计算
1 2 4 8 16 32 64怎么算
1,2,4,8,16,32,64,;...:规律
1+2+4+8+16+32+64+128=
1+2+4+8+16+32+64+128简便算法
1+2+4+8+16+32+64+128+...=
1+2+4+8+16+32+64+128+256
1+2+4+8+16+32+64+…+8192过程
128+64+32+16+8+4+2+1+2/1+4/1+8/1+16/1+32/1=?
64,64,32,8,1,( 64,64,32,8,1,( )( )里填什么?A,1/16B,1/8C,1/4D,1/2写出算法,
2,-4,8,-16,32,-64… 1 -1,2,-4,8,-16,32…2,-4,8,-16,32,-64… 1 -1,2,-4,8,-16,32… 2 第一行数与第二行数有什么关系
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
1/2-1/4-1/8-16/1-32/1-64/1-128/1-256/1
1/2-1/4-1/8-1/16-1/32-1/64-1/128-1/256
1/2+1/4+1/8+1/16+1/32+1/64+1/128+.+1/1024
1-2/1-4/1-8/1-16/1-32/1-64/1-128/1
1/2-1/4-1/-1/8-1/16-1/32-1/64----------1/1024
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256