Necronic
Staff member
So.....I've been somewhat unhappy with my career and have decided to go back for an advanced degree in engineering to expand my options. That means I have to take some classes. Right now I am taking Engineering Mathematics, which, it turns out, is Differential Equations. I have avoided this math for years as well as I could, but now....now I have to learn it!
My first quiz (due in a week) throws me right into the monstrosity of it. What kills me the most is that this dude uses a pretty slanged out Lagrange symbology, which I don't particularly like. Well...actually what kills me the most is that its been 10 years sincce I have taken calculus. What was I thinking?
Anyways, that's not my question. Here's my question.
Identify the differential equation solved by
y=e^(-6x)
A) y'' + 10y' - 4y = 0
B) y'' - 10y' + 24 y = 0
C) y'' + 6y' + 24y = 0
D) y'' - 10 y' - 24y = 0
E) y'' + 10y' + 24y = 0
F) None of the above
In liebniz notation I am pretty sure the first one is
d^2y/dx^@ + 10dy/dx - 4y = 0
but I can't remember how to integrate something like this. I know you can integrate by parts, but what's the integral of y?
My first quiz (due in a week) throws me right into the monstrosity of it. What kills me the most is that this dude uses a pretty slanged out Lagrange symbology, which I don't particularly like. Well...actually what kills me the most is that its been 10 years sincce I have taken calculus. What was I thinking?
Anyways, that's not my question. Here's my question.
Identify the differential equation solved by
y=e^(-6x)
A) y'' + 10y' - 4y = 0
B) y'' - 10y' + 24 y = 0
C) y'' + 6y' + 24y = 0
D) y'' - 10 y' - 24y = 0
E) y'' + 10y' + 24y = 0
F) None of the above
In liebniz notation I am pretty sure the first one is
d^2y/dx^@ + 10dy/dx - 4y = 0
but I can't remember how to integrate something like this. I know you can integrate by parts, but what's the integral of y?