00:01
Here, we're told that we have two differential functions, f and g.
00:05
We also know that h of x is equal to g of f of x.
00:14
And then they tell us a few other details.
00:17
We know that the slope of the tangent line to the graph of f.
00:21
So that means f prime at 4 is 3, because that's the slope of the tangent line is the derivative at the point.
00:32
Further, we can say, if we want to, that f of 4, is equal to 7 because that's what 4 comma 7 means.
00:39
And then they tell us the slope of the tangent line at g at 7 comma 9 is negative 2.
00:44
So that means g prime of 9, sorry, g prime of 7 is equal to negative 2.
00:57
And we also know that g of 7 is equal to 9.
01:01
Now we want to determine the slope of the tangent line to the graph of h.
01:06
So that means h prime at 4.
01:09
That's what we want to find...