# Higher order Derivative Ques

• Jan 11th 2010, 03:19 PM
Higher order Derivative Ques
show that the equation $f" (x) + 4 f'(x) + 4 f(x) = 0$ is satisfied if $f(x) = (3x-5)e^-2x$

What is this question asking me to do? I know I will need to find the first and second derivative but where does the + 4 part fit in?
• Jan 11th 2010, 03:34 PM
Henryt999
Quote:

show that the equation $f" (x) + 4 f'(x) + 4 f(x) = 0$ is satisfied if $f(x) = (3x-5)e^-2x$