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
`{-1/3, 1/(4), -1/(5), 1/(6), -1/(7), 1/(8), ...}`
Be sure your variables match those in the question `(-1)^n/(n+2)`