f(n)=-2f(n-1)-3

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Solution for f(n)=-2f(n-1)-3 equation:


Simplifying
f(n) = -2f(n + -1) + -3

Multiply f * n
fn = -2f(n + -1) + -3

Reorder the terms:
fn = -2f(-1 + n) + -3
fn = (-1 * -2f + n * -2f) + -3
fn = (2f + -2fn) + -3

Reorder the terms:
fn = -3 + 2f + -2fn

Solving
fn = -3 + 2f + -2fn

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.
-2f + fn = -3 + 2f + -2f + -2fn

Combine like terms: 2f + -2f = 0
-2f + fn = -3 + 0 + -2fn
-2f + fn = -3 + -2fn

Add '2fn' to each side of the equation.
-2f + fn + 2fn = -3 + -2fn + 2fn

Combine like terms: fn + 2fn = 3fn
-2f + 3fn = -3 + -2fn + 2fn

Combine like terms: -2fn + 2fn = 0
-2f + 3fn = -3 + 0
-2f + 3fn = -3

Reorder the terms:
3 + -2f + 3fn = -3 + 3

Combine like terms: -3 + 3 = 0
3 + -2f + 3fn = 0

The solution to this equation could not be determined.

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