Homework Statement
Find the indicial roots of the following Differential Equation: xy'' - y' + x3y = 0
Homework Equations
y = Ʃ[n=0 to infinity]cnxn+r
y' = Ʃ[n=0 to infinity](n+r)cnxn+r-1
y'' = Ʃ[n=0 to infinity](r+r)(n+r-1)cnxn+r-2
The Attempt at a Solution
Plugging these values into the...
So this would leave me with two parallel resistors of 8 Ohms each? And finding the equivalent resistance would give us 4 Ohms?
If you (or someone else) can confirm this, it would be greatly appreciated!
The first part is correct.
The second part sounds correct, though I am not positive.
EDIT: Actually, there would not be a change in frequency. You would hear the sound sooner, but the frequency (and wavelength) would remain the same.
Homework Statement
Find the equivalent resistance in the circuit below:
Homework Equations
The Attempt at a Solution
I know the two 4 Ohm resistors (on the same wire) are in series and thus add to 8 Ohms. However, I do not know where to go from here. When the resistors are in a...