Try another version of this question Write an explicit formula for the sequence:
`a_n = `
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Question 1
`{1/4, -1/(5), 1/(6), -1/(7), 1/(8), -1/(9), ...}`
Be sure your variables match those in the question `(-1)^(n+1)/(n+3)`