00:03
Good day.
00:05
This is question number 22.
00:08
And we're looking at the vector is x of t and y of t here.
00:14
And in this case, i didn't really bother writing down the whole problem.
00:20
You can read it off.
00:21
But basically, there's a few steps to this.
00:26
And the first one is to look at whether or not x of t and y of t form a fundamental solution set.
00:33
For the homogeneous linear equation, x prime equals to a x.
00:42
Okay, so again, they used in notation x1, x2, but i just use x and y, which is kind of a big deal, i guess, but still.
00:56
Okay, so since x of t and y of t are two vectors, meaning they're two dimensional, to have two coordinates.
01:07
It is enough to check the ronskian.
01:10
And in this case, so the ronskian is just the determinant of this matrix.
01:20
And, you know, if you do the algebra again, this is a two -by -two matrix, you should by now know how to calculate the determinant of this, you end up with negative 5e to the 3t and that you can check that w of 0 is not zero...