Chapter 25: Problem 15
Find antiderivatives of the given functions. $$f(t)=6 t^{3}+12$$
Short Answer
Expert verified
The antiderivative of \( f(t) = 6t^3 + 12 \) is \( \frac{3t^4}{2} + 12t + C \).
Step by step solution
01
Identify the Function Parts
We have the function \( f(t) = 6t^3 + 12 \). This function includes two separate terms: one polynomial term \( 6t^3 \) and a constant term \( 12 \). The goal is to find the antiderivative of each term separately.
02
Antiderivative of the Polynomial Term
To find the antiderivative of \( 6t^3 \), use the power rule for integration. The power rule states that for \( t^n \), the antiderivative is \( \frac{t^{n+1}}{n+1} \). Applying this to \( 6t^3 \), we get \( \frac{6t^{3+1}}{3+1} = \frac{6t^4}{4} = \frac{3t^4}{2} \).
03
Antiderivative of the Constant Term
The antiderivative of a constant \( C \) is \( Ct \). Here, the constant is \( 12 \), so its antiderivative is \( 12t \).
04
Combine the Antiderivatives
To form the complete antiderivative of \( f(t) = 6t^3 + 12 \), combine the results from Steps 2 and 3. The antiderivative of the function is \( \frac{3t^4}{2} + 12t \). Don't forget to add the constant of integration \( C \), resulting in \( \frac{3t^4}{2} + 12t + C \).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Power Rule for Integration
The Power Rule for Integration is a fundamental tool in calculus when tackling antiderivatives. If you're faced with a function involving a term like \( t^n \), the Power Rule guides you in finding its antiderivative. Here's how it works: for any term \( t^n \), where \( n eq -1 \), the antiderivative is given by \( \frac{t^{n+1}}{n+1} \). This essentially means that you add 1 to the power of \( t \) and then divide by this new power.
- Example: If the term is \( 6t^3 \), following the Power Rule, its antiderivative would be \( \frac{6t^{3+1}}{3+1} = \frac{6t^4}{4} = \frac{3t^4}{2} \).
- Notice how straightforward it is: just a couple of arithmetic steps.
Polynomial Antiderivative
The concept of a Polynomial Antiderivative extends beyond single power terms to include entire polynomial expressions. A polynomial function is made up of several terms, each potentially having its own power of \( t \). When you're finding the antiderivative of a polynomial, like \( 6t^3 + 12 \), the process involves applying the Power Rule term by term.
First, look at each individual term in the polynomial and apply the Power Rule to each:
It's crucial never to forget \( C \), as any family of functions that differ by a constant can share the same derivative. Always include it in your final answer.
First, look at each individual term in the polynomial and apply the Power Rule to each:
- For \( 6t^3 \), the antiderivative is \( \frac{3t^4}{2} \) as derived using the Power Rule for Integration.
- Constant terms require a different approach, which we'll cover next.
It's crucial never to forget \( C \), as any family of functions that differ by a constant can share the same derivative. Always include it in your final answer.
Constant Term Antiderivative
Finding the antiderivative of a constant term is a straightforward process, but it's important to keep it separate from the Power Rule. When you have a constant term, like \( 12 \), its antiderivative is not conquered by changing its power, because it doesn't have one like a polynomial does. Instead, to find the antiderivative of a constant \( C \), simply multiply it by \( t \). Thus, the antiderivative of \( 12 \) is \( 12t \).
- This approach ensures that when you derive \( 12t \), you return to the original constant, \( 12 \).
- The process highlights that constant terms have a straightforward path to their antiderivative.