00:01
In this question, they say, using the separation of variables technique, i want to solve this differential equation with initial condition.
00:08
I have dy dx is equal to e to the power of 2x plus 3y with initial condition y of 0 equals 1.
00:22
The hint they give us is to use a property of exponentials to rewrite our differential equation so it can be separated.
00:30
So i'm going to say dy dx is equal to e to the 2x times e to the 3y.
00:39
Now, i'm going to multiply up the dx.
00:43
So dy dx, let me multiply by dx i guess first.
00:47
So i'm going to say just dy is equal to e to the 2x times e to the 3y dx.
00:57
Then i'm going to divide by e to the 3y.
01:02
So 1 over e to the 3y dy equals e to the 2x dx.
01:11
Now, of course, 1 over e to the 3y is e to the negative 3y.
01:16
So e to the negative 3y dy equals e to the 2x dx.
01:23
And now i'm ready to integrate both sides.
01:27
So what do we get? here on the left, i'm getting negative a third e to the negative 3y equals one half e to the 2x power plus c.
01:41
But then i need to use my initial condition.
01:43
Y of 0 equals 1...