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Simplifying f(n) = f(n + -2) Multiply f * n fn = f(n + -2) Reorder the terms: fn = f(-2 + n) fn = (-2 * f + n * f) fn = (-2f + fn) Add '-1fn' to each side of the equation. fn + -1fn = -2f + fn + -1fn Combine like terms: fn + -1fn = 0 0 = -2f + fn + -1fn Combine like terms: fn + -1fn = 0 0 = -2f + 0 0 = -2f Solving 0 = -2f Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '2f' to each side of the equation. 0 + 2f = -2f + 2f Remove the zero: 2f = -2f + 2f Combine like terms: -2f + 2f = 0 2f = 0 Divide each side by '2'. f = 0 Simplifying f = 0
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