$\"\"$

\

The differential equation is $\"\"$ and the initial condition is $\"\"$ .

\

$\"\"$

\

$\"\"$

\

Apply integral on each side.

\

$\"\"$

\

$\"\"$

\

Apply the formula : $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

The initial condition is $\"\"$ .

\

Find the value of $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

$\"\"$ .