1/3,1,9,243,()
- A19683
- B19785
- C19827
- D19869
1、-1/7,1/7,1/8,-1/4,-1/9,1/3,1/10,()
-1/7,1/7,1/8,-1/4,-1/9,1/3,1/10,()A-2/5B2/5C1/12D5/8
1,3,6,9,9,( )A0B6C9D18
:O.9,1.1,1.3,1.5,1.7,( )。A1.8B1.9C2.1D2.3
4、:从1,3,9,27,81,243这六个数中,每次取出若干个数(每次取数,每
:从1,3,9,27,81,243这六个数中,每次取出若干个数(每次取数,每个数只能取一次)求和,可以得到一个新数,一共有63个数。如果把它们以小到大依次排列起来是:1,3,4,9,1...
5、1/3, 1/7, 7/9, 1/31, 19/45, (
1/3, 1/7, 7/9, 1/31, 19/45, ( )。A11/21B13/51C63/65D91/165
1,1,3,4,9,7,( )A11B5C27D10