00:01
So we're given f of x.
00:04
Now, i would rewrite this instead of tangent to the fourth of whatever, i would rewrite it as with parentheses.
00:14
So instead of writing the fourth right here, you can move it on the outside as long as you throw in parentheses.
00:19
And then of x cubed.
00:21
And i like writing it this way.
00:22
So you can see with the parentheses, an interfunction inside of another interfunction to the outermost function is taken to the fourth power.
00:32
So this is definitely a chain rule inside of a chain rule.
00:36
So when you're asked to find the derivative, you do the outermost function first.
00:39
That's bringing the four in front and subtract one from four is now to the third power.
00:44
And you leave that inner function alone...