number pattern[急]

1)1,3,9,27,.....
number pattern=3^(n-1)

2)4,12,36,108.....
number pattern=4x3^(n-1)

3)1,5,12,22.....
number pattern=1+4+7...+3n-2=n(3n-1)/2

2007-06-16 18:15:05 補充：
樓上嗰位朋友搞咩呀!!!!1 x 3= 3 x 3 = 9 x 3 = 27 x 3 =814 x 3 = 12 x 3 = 36 x 3 = 108 x 3 = 3241 + 4 = 5 + 7 = 12 + 10 = 22 + 13 = 35 + 16 = 51

1,3,9,27,.....
=3^0,3^1,3^2,3^3.............3^(n-1)

4,12,36,108
=(3^0)x4,(3^1)x4,(3^2)x4,(3^3)x4.............[3^(n-1)]x4

1,5,12,22.....
=1x1,2x2.5,3x4,4x5.5......................n(3n-1)/2


....x^01(不論x=?,除了0)(x0)

1,3,9,27,.....
係咩number pattern??
1 x 3= 3 x 3 = 9 x 3 = 27 x 3 =81

仲有4,12,36,108.....
係咩number pattern??
4 x 3 = 12 x 3 = 36 x 3 = 108 x 3 = 324

仲有1,5,12,22.....
係咩number pattern??
1 + 4 = 5 + 7 = 12 + 10 = 22 + 13 = 35 + 16 = 51

1, 3, 9, 27, ......
number pattern = 3^(n-1)

1,3,9,27,.....
-->3^0,3^1,3^2,3^3.............3^n

4,12,36,108
=4(3)^0,4(3)^1,4(3)^2,4(3)^3,.........................4(3^n)