00:01
Okay, so for this problem, we're going to do, we're going to use the formula, d, y, over dt over d.
00:07
So this one is really simple, actually.
00:09
So i'm going to start with x here.
00:11
So we'll do the derivative of t squared is just 2t.
00:14
And here, this top one is a little bit more complicated, but almost the exact same.
00:18
So we're going to do power rule first, thinking of this as our inside function.
00:23
So we're going to have 2 minus 2t, of course, minus 1.
00:27
I'm here on the exponent.
00:29
So we have to add an exponent.
00:31
And then times negative 1 because the derivative of 2 minus c is negative 1.
00:36
Here i'm going to rewrite it.
00:38
So we're going to have negative 4 and 2 minus 2 times negative t is negative 2t times negative 1 is positive 2t over 2t.
00:50
And now we're going to simply plug in here...