- #1
Saladsamurai
- 3,020
- 7
Homework Statement
[tex]\frac{dx}{dt} +\frac{dy}{dt} + y - x = e^{2t}[/tex]
[tex]\frac{d^2x}{dt^2} +\frac{dy}{dt} = 3e^{2t}[/tex]
I am a little stumped on this one. I tried writing it using D as the differential operator d/dt:
D(x+y) +x - y = e2t
D2x+Dy = 3e2t
but that doesn't do anything but change the variables to something else... if I subtract the 1st EQ from second I get
[tex]\frac{d^2x}{dt^2}-\frac{dx}{dt} -y +x = 2e^{2t}[/tex]
But I still have x AND y in here.
Any hints on this?