- #1
colonelone
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Homework Statement
What do you do if one of the roots to the characteristic equation of a differential equation is zero when using variation of parameters?
Homework Equations
The Attempt at a Solution
The problem I encountered this in is
y" - y' = 4t
Characteristic equation
r2 - r = 0
so
r = -1 , 0
Therefore
y1 = e-t
but
y2 = 0
which would make the Wronskian zero.
Any thoughts?