So it's the points where the derivatives equal to 0, or the derivative just doesn't exist.

They're the points where either the derivative is 0, or the derivative doesn't exist.

linear equation, because you have the second derivative, the first derivative, and y, but they're not multiplied by the function or the derivatives.

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It's just a point at which the derivative and the function is undefined.

Well, the second derivative is just the slope of the derivative.

Let's take the derivative, because the derivative at c is going to be equal to 2.

So the first derivative is 4t 1, you take the derivative of that, you just get 4.

This is the first derivative.

Derivative equals 0.

The second derivative.

Or the derivative.

This is also non linear, because I multiplied the function times its second derivative.

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Derivative chain rule.

That's the derivative.

Or the second derivative.

So we just take the derivative.

The derivative is going to be 256.

How do we take the derivative?

1st derivative r.

Because the derivative is negative.

A so the second derivative of the sum of those two functions is going to be the second derivative of both of them summed up plus B times the first derivative of the sum plus C times the sum of the functions.

That's just g prime prime, plus h prime prime, plus B times the first derivative of this thing g prime plus h prime, plus C times this function g plus h.

This was the second derivative.

Let's do our second derivative.

The second derivative is 0.

What's the second derivative?

What is the second derivative?

Our second derivative is positive.

The second derivative was positive.

So what will be the derivative?

And what's the second derivative?

2nd derivative r squared.

Figure out the derivative of the general solution.

Well what's the derivative?

So what is the derivative?

So the derivative, it starts.

Sorry, this is the first derivitive.

The second derivative would be 2A.

So this is the derivative.

But the way I learned it is a critical point if the derivative isn't defined, but the function is.

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So the derivative with respect to x of that, and then the derivative with respect to x of that.

So actually, right below x is less than 0, the second derivative is positive.