Math Problem Statement
how do i approach this: if f(x) = sqrt(x+2) then lim h->0 (f(2+h)-f(2))/h =
Solution
This is a limit that involves the difference quotient, and it is essentially the definition of the derivative of the function at the point . To approach this limit, we can follow these steps:
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Recall the definition of the derivative:
The limit given is the definition of the derivative of at : This is , the derivative of at . -
Find the derivative of :
The function . To find the derivative , we use the chain rule: Therefore, . -
Evaluate the derivative at :
Now, substitute into the derivative:
Thus, the value of the limit is:
Do you want further details or have any questions?
Here are 5 related questions that expand on this concept:
- How would you find the derivative of using the limit definition?
- What is the general form of the derivative of ?
- How does the chain rule apply to composite functions like ?
- How do you approach the limit definition of the derivative when the function involves a fraction?
- What is the geometric interpretation of the derivative at a point?
Tip: When working with square root functions, remember to be careful with the chain rule since the derivative depends on the inner function as well!
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Math Problem Analysis
Mathematical Concepts
Calculus
Limit Definition
Derivatives
Formulas
Limit definition of derivative
Chain rule
Theorems
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Suitable Grade Level
Advanced High School / College
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