All AP Calculus AB Resources
Example Questions
Example Question #7 : Chain Rule And Implicit Differentiation
Find the derivative of the function of the circle
To find the derivative through implicit differentiation, we have to take the derivative of every term with respect to x. Don't forget that each time you take the derivative of a term containing y, you must multiply its derivative by y'. So, when we take the derivative of each term, we get The next step is to solve for y', so we put all terms containing y' on the left side of the equation: . To get y' alone, divide both sides by to get . To simplify even further, we can factor a 2 out of the numerator and denominator and cancel them. So, the final answer is .
Example Question #8 : Chain Rule And Implicit Differentiation
Find the derivative of the function using implicit differentiation.
cannot be solved
To find the derivative through implicit differentiation, we have to take the derivative of every term with respect to x. Don't forget that each time you take the derivative of a term containing y, you must multiply its derivative by y'. So, when we take the derivative of each term, we get . The next step is to solve for y', so we put all terms containing y' on the left side of the equation: . To get y' alone, divide both sides by -3 to get . To simplify even further, we can factor a -2 out of the numerator and denominator and cancel them. So, the final answer is .
Example Question #9 : Chain Rule And Implicit Differentiation
Find the derivative of the function .
To find the derivative through implicit differentiation, we have to take the derivative of every term with respect to x. Don't forget that each time you take the derivative of a term containing y, you must multiply its derivative by y'. So, when we take the derivative of each term, we get . The next step is to solve for y', so we put all terms containing y' on the left side of the equation: . Next, factor out the y' from both terms on the left side of the equation so that we can solve for it: . To get y' alone, divide both sides by to get a final answer of .
Example Question #10 : Chain Rule And Implicit Differentiation
Find the derivative of the function .
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Before we take the derivative of the logarithmic function, we can make it easier for ourselves by simplifying the equation to . We can bring the exponent of 6 down in front of the natural log of x due to properties of logarithms. Next, take the derivative of each term in terms of x. Don't forget to multiply by y' each time you take the derivative of a term containing y! When we do this, we should get because the derivative of lnx is 1/x. Next, solve for y' by multiplying both sides by y to get the final answer of .
Example Question #101 : Computation Of The Derivative
. Find .
To take the derivative, you must first take the derivative of the outside function, which is sine. However, the , or the angle of the function, remains the same until we take its derivative later. The derivative of sinx is cosx, so you the first part of will be . Next, take the derivative of the inside function, . Its derivative is , so by the chain rule, we multiply the derivatives of the inside and outside functions together to get .
Example Question #102 : Computation Of The Derivative
. Using the chain rule for derivatives, find .
By the chain rule, we must first take the derivative of the outside function by bringing the power down front and reducing the power by one. When we do this, we do not change the function that is in the parentheses, or the inside function. That means that the first part of will be . Next, we must take the derivative of the inside function. Its derivative is . The chain rule says we must multiply the derivative of the outside function by the derivative of the inside function, so the final answer is .
Example Question #13 : Chain Rule And Implicit Differentiation
Use implicit differentiation to find is terms of and for,
To differentiate the equation above, start by applying the derivative operation to both sides,
Both sides will require the product rule to differentiate,
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Common Mistake
A common mistake in the previous step would be to conclude that instead of . The former is not correct; if we were looking for the derivative with respect to , then would in fact be . But we are not differentiating with respect to , we're looking for the derivative with respect to .
We are assuming that is a function of , so we must apply the chain rule by differentiating with respect to and multiplying by the derivative of with respect to to obtain .
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Collect terms with a derivative onto one side of the equation, factor out the derivative, and divide out to solve for the derivative ,
Therefore,
Example Question #106 : Computation Of The Derivative
Differentiate,
(1)
An easier way to think about this:
Because is a function of a function, we must apply the chain rule. This can be confusing at times especially for function like equation (1). The differentiation is easier to follow if you use a substitution for the inner function,
Let,
(2)
So now equation (1) is simply,
(3)
Note that is a function of . We must apply the chain rule to find ,
(4)
To find the derivatives on the right side of equation (4), differentiate equation (3) with respect to , then Differentiate equation (2) with respect to .
Substitute into equation (4),
(5)
Now use to write equation (5) in terms of alone:
Example Question #411 : Ap Calculus Ab
Find given
Here we use the chain rule:
Let
Then
And
Example Question #412 : Ap Calculus Ab
If , calculate
Using the chain rule, we have
.
Hence, .
Notice that we could have also simplified first by cancelling the natural log and the exponential function leaving us with just , thereby avoiding the chain rule altogether.