(1)3,5,9,17,33,……;(2)0,1,0,1……;写出数列的通项公式

问题描述:

(1)3,5,9,17,33,……;(2)0,1,0,1……;写出数列的通项公式
还有(2)2/3,4/15,6/35,8/63,100/99,……;(3)0,1,0,1,0,1,

(1)2的n+1次方+1
(2)1+((-1)的n次方)
(2)2n/((2n-1)(2n+1))
(3)和第一个(2)一样