3＋9＋81＋．．．＋第5個＝？

3＋9＋81＋．．．＋第5個＝？

3 + 3^2 + 3^4 + 3^8 + 3^16 + 3^32 = 3 ^ (1+2+4+8+16+32) = 3 ^ 63

2007-05-12 04:06:36 補充：
= 43053375 (NOT) 3 ^ (1 2 4 8 16 32) = 3 ^ 63

2007-05-12 04:08:16 補充：
3 3^2 3^4 3^8 3^16= 343053375

3+9+81+6561+43046721=43053375

每個都係平方數"
3x3=9
9x9=81
81x81=6561
6561x6561=43053375

第5個數係43053375"
全是平方數!!

3+9+81+6561+43046721=43053375

3 + 3x3 + 9x9 + 81x81 + 6561x6561 = 43053375

3＋9＋81＋．．．＋第5個＝?

方法:
3+9+81+6561+43046721=43053375

3 + 3x3 + 9x9 + 81x81 + 6561x6561 = 43053375

I gues the sequence should be:

9 = 3 x 3
6561 = 81 x 81
43046721 = 6561 x 6561

Answer should be:
3+9+81+6561+ 43046721=43053375

3+9+81+6561+43046721=43053375