Math Problem Statement
Find the first and second derivatives of the function.
f(x) =
x2
7 + 4x
f ′(x)
=
14x+4x2(7+4x)2 f ″(x)
=
(7+4x2)(14+8x)−(14x+4x2)(8(7+4x))(7+4x)4
Solution
Let's break this down carefully and go through the steps of finding the first and second derivatives of the function.
The given function is:
1. First Derivative
We'll use the quotient rule for derivatives to differentiate . The quotient rule states that:
Here, and .
First, calculate the derivatives of and :
Now, apply the quotient rule:
Simplify the numerator:
So the first derivative is:
2. Second Derivative
Now, we differentiate again to find the second derivative. We'll use the quotient rule again, where:
First, calculate the derivatives of and :
Now, apply the quotient rule:
Simplify the expression for . The final result after simplification will look like:
Thus, the second derivative is:
Summary:
- First derivative:
- Second derivative:
Would you like to go over any specific steps in more detail or clarify any part of the solution?
Here are five related questions you can explore:
- How does the quotient rule differ from the product rule in differentiation?
- What are some other functions where the quotient rule would apply?
- Can we simplify the second derivative further in this case?
- What is the importance of higher-order derivatives in calculus?
- How would this function behave as ?
Tip: Always check for opportunities to simplify the numerator when applying the quotient rule to avoid complex expressions!
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Math Problem Analysis
Mathematical Concepts
Calculus
Differentiation
Quotient Rule
Higher-Order Derivatives
Formulas
Quotient Rule: d/dx [u(x) / v(x)] = [u'(x)v(x) - u(x)v'(x)] / [v(x)]^2
First Derivative of f(x): f'(x) = (4x^2 + 14x) / (7 + 4x)^2
Second Derivative of f(x): f''(x) = [(7 + 4x)(8x + 14) - (4x^2 + 14x)(8)] / (7 + 4x)^3
Theorems
Quotient Rule
Suitable Grade Level
Undergraduate Calculus
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