f(n)=f(n-1)-3

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Solution for f(n)=f(n-1)-3 equation:


Simplifying
f(n) = f(n + -1) + -3

Multiply f * n
fn = f(n + -1) + -3

Reorder the terms:
fn = f(-1 + n) + -3
fn = (-1 * f + n * f) + -3
fn = (-1f + fn) + -3

Reorder the terms:
fn = -3 + -1f + fn

Add '-1fn' to each side of the equation.
fn + -1fn = -3 + -1f + fn + -1fn

Combine like terms: fn + -1fn = 0
0 = -3 + -1f + fn + -1fn

Combine like terms: fn + -1fn = 0
0 = -3 + -1f + 0
0 = -3 + -1f

Solving
0 = -3 + -1f

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Add 'f' to each side of the equation.
0 + f = -3 + -1f + f
Remove the zero:
f = -3 + -1f + f

Combine like terms: -1f + f = 0
f = -3 + 0
f = -3

Simplifying
f = -3

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