Calculating Derivatives of Composite Functions

In summary, you must use the given values and apply the appropriate rules (chain rule, product rule, quotient rule) to find the requested values for each problem in the given set.
  • #1
kxpatel29
3
0

Homework Statement


Given F(2)=5, F'(2)=6, F(4)=3, F'(4)=6 and G(3)=6, G'(3)=3, G(4)=2, G'(4)=1
A. H(4) if H(x)=F(G(x)) = ?
B. H'(4) if H(x)=F(G(x)) = ?
C. H(4) if H(x)=G(F(x)) = ?
D. H'(4) if H(x)=G(F(x)) =?
E. H'(4) if H(x)=F(x)/G(x) =?


Homework Equations


My teacher did not teach this yet, so I have no idea. My book doesn't even cover this


The Attempt at a Solution


Would we just use the given values? For E, F(x)/G(x)=1/2?
 
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  • #2
kxpatel29 said:

Homework Statement


Given F(2)=5, F'(2)=6, F(4)=3, F'(4)=6 and G(3)=6, G'(3)=3, G(4)=2, G'(4)=1
A. H(4) if H(x)=F(G(x)) = ?
B. H'(4) if H(x)=F(G(x)) = ?
C. H(4) if H(x)=G(F(x)) = ?
D. H'(4) if H(x)=G(F(x)) =?
E. H'(4) if H(x)=F(x)/G(x) =?


Homework Equations


My teacher did not teach this yet, so I have no idea. My book doesn't even cover this


The Attempt at a Solution


Would we just use the given values? For E, F(x)/G(x)=1/2?
You have to use the given values, yes, but except for A and C, you need to take the derivative using either the chain rule (B and D) or quotient rule (E).

For example, if problem E were changed like so:
Given F(2)=5, F'(2)=6, F(4)=3, F'(4)=6 and G(3)=6, G'(3)=3, G(4)=2, G'(4)=1
Find H'(4) if H(x)=F(x)G(x)

then H'(4) = F(4)G'(4) + F'(4)G(4) = 3*1 + 6*2 = 3 + 12 = 15.
Here I have used the product rule.

Similar idea for all of them.
 

Related to Calculating Derivatives of Composite Functions

1. What are derivatives in Calculus 2?

Derivatives in Calculus 2 refer to the rate of change of a function at a specific point. They are used to calculate the slope of a tangent line to a curve at a given point and can also represent the instantaneous rate of change of a function.

2. How can I find derivatives in Calculus 2?

To find derivatives in Calculus 2, you can use various methods such as the power rule, product rule, quotient rule, and chain rule. It is important to also understand the concept of limits and how they are used to calculate derivatives.

3. What is the purpose of finding derivatives in Calculus 2?

The main purpose of finding derivatives in Calculus 2 is to analyze the behavior of functions and solve real-world problems involving rates of change. Derivatives can also help in finding maximum and minimum values of functions.

4. Can you give an example of finding derivatives in Calculus 2?

Sure, let's say we have the function f(x) = 2x^3 + 4x^2 - 3x + 5. To find the derivative of this function, we would use the power rule to get f'(x) = 6x^2 + 8x - 3. This tells us the slope of the tangent line at any given point on the original curve.

5. What are some common mistakes to avoid when finding derivatives in Calculus 2?

Some common mistakes to avoid when finding derivatives in Calculus 2 include not understanding the basic concepts and rules, not simplifying expressions before finding the derivative, and making calculation errors. It is also important to pay attention to the domain of the function and any restrictions when finding derivatives.

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