Study the following series of numbers: 1, - 3, 5, - 7, 9, - 11, 13 According to this rule, the nth number should be () A. 2n-1B. 1-2nC. (2n-1)(-1)nD. (2n-1)(-1)n+1

Study the following series of numbers: 1, - 3, 5, - 7, 9, - 11, 13 According to this rule, the nth number should be () A. 2n-1B. 1-2nC. (2n-1)(-1)nD. (2n-1)(-1)n+1

The nth number is (2n-1) (- 1) n + 1