Why is the derivative of a circle's area its perimeter?

In summary, derivative relationships are mathematical tools used to describe the rate of change of a function in response to small changes in its input. They are important in science as they allow for the analysis of complex systems and have various methods for calculation. Real-world applications include predicting motion, optimizing processes, and identifying patterns in data. Derivative relationships can also be negative, indicating a decrease in the function as the input variable increases.
  • #1
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Homework Statement



Explain why the relationship of the derivative of a Circle's area is its perimeter makes sense.

Homework Equations



Area of a Cirle=pi*r^2

The Attempt at a Solution


da/dr=2pi*r
2r=diameter and the circumfrece=pi*D so da/dr=Circumfrence
How do i explain why this works?
 
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  • #2
No idea? Draw a circle of radius r and a circle of radius r+dr. Can't you see a geometric way to approximate the difference in the areas?
 

Related to Why is the derivative of a circle's area its perimeter?

1. What are derivative relationships?

Derivative relationships refer to the mathematical concept of derivatives, which are used to describe the rate of change of a function with respect to its input variable. In other words, it describes how a function changes in response to small changes in its input.

2. Why are derivative relationships important in science?

Derivative relationships are important in science because they allow us to understand and analyze complex systems by breaking them down into smaller parts. They are used in many fields of science, including physics, chemistry, and biology, to describe and predict the behavior of systems and processes.

3. How are derivative relationships calculated?

Derivative relationships can be calculated using a variety of methods, including the limit definition, the power rule, and the chain rule. The specific method used depends on the type of function and the complexity of the relationship being studied.

4. What are some real-world applications of derivative relationships?

Derivative relationships have many real-world applications, such as predicting the motion of objects, optimizing processes in engineering and economics, and modeling population growth in biology. They are also used in data analysis and machine learning to identify patterns and trends in large datasets.

5. Can derivative relationships be negative?

Yes, derivative relationships can be negative. This indicates that the function is decreasing as the input variable increases. In other words, the rate of change is negative, meaning the function is getting smaller or decreasing in value.

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