Write an explicit formula for the sequence: {1/3,−1/4,1/5,−1/6,1/7,−1/8,...}

Question

Write an explicit formula for the sequence:

{1/3,−1/4,1/5,−1/6,1/7,−1/8,...}

Answer 1

(-1)ⁿ⁺¹/n for integer n≥3