2,-4,8,-16,32,-64.(1)
1、2、4、8、16、32、64.有什么规律?
1)-2,4,-8,16,-32,64.(2)0,6,-6,18,-30,66.
1,-2,4,-8,16,-32,64.顺次写下去,第2005个数是什么?
有一列数,按一定的规律排列成-1,2,-4,8,-16,32,-64.
-1,2,-4,8,-16,32,-64.按其规律求第n个数
1,-2,4,-8,16,-32,64.顺次写下去,写到第2005个数是?
[-2,4,-8,16,-32,64.(1)] [0,6,-6,18,-30,66.(2)] [-1,2,-4,8,-1
1/2+1/4+1/8+1/16+1/32+1/64.这组数的排列规律是什么
找规律1/2,-1/4,1/8,-1/16,1/32,-1/64.第n个数是什么
观察下列三行数:-1,2,-4,8,-16,32,...;①-2,4,-8,16,-32,64...;②0,6,-6,1
2,-4,8,-16,32,-64.(1) 4,-2,10,-14,34,-62.(2) 1,-2,4 ,-8,16,-
写出数列1/2,1/4,-5/8,13/16,-29/32,61/64.的通项公式