The differential equation is
.

Apply integral on each side.
\
.
Consider
.
Apply parts of integration formula:
.
Let
.
Apply derivative on each side.
\
.
Let
.
Apply integral on each side.
\
.
Substitute corresponding values in
.



.
Consider
.
Let
.
Apply derivative on each side with respect to
.

.
Substitute
and
in
.





Substitute
.

.
.
Substitute
and
in
.




. \ \
The general solution is
.
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