Write a word phrase for the expression 10 + (6 – 4).
2 answers:
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True.
Since
, 
and the solutions are decreasing functions.
Since
To take advantage of the characteristic solutions and
, you can try the method of variation of parameters, where we look for a solution of the form
with the condition that
Then
Substituting into the ODE gives
Since
the above reduces to
and
form a linear system that we can solve for
using Cramer's rule:
where is the Wronskian determinant of the fundamental system and
is the same determinant, but with the
-th column replaced with
.
So we have
Then the particular solution is
giving the general solution to the ODE,