I found this for the answer. I hope that I helped.
Simplifying F(n) = f(n + -1) + 1 Multiply F * n nF = f(n + -1) + 1 Reorder the terms: nF = f(-1 + n) + 1 nF = (-1 * f + n * f) + 1 nF = (-1f + fn) + 1 Reorder the terms: nF = 1 + -1f + fn Solving nF = 1 + -1f + fn Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1fn' to each side of the equation. -1fn + nF = 1 + -1f + fn + -1fn Combine like terms: fn + -1fn = 0 -1fn + nF = 1 + -1f + 0 -1fn + nF = 1 + -1f Reorder the terms: -1 + f + -1fn + nF = 1 + -1f + -1 + f Reorder the terms: -1 + f + -1fn + nF = 1 + -1 + -1f + f Combine like terms: 1 + -1 = 0 -1 + f + -1fn + nF = 0 + -1f + f -1 + f + -1fn + nF = -1f + f Combine like terms: -1f + f = 0 -1 + f + -1fn + nF = 0 The solution to this equation could not be determined.