Find Tolerance Limit for f(x)=x^2.5 Near 0

In summary, when considering the function f(x)=x^2.5 and its limit as x approaches 0, the input must be less than or equal to 0.1 (positive or negative) to guarantee that the output will be within 0.1 of the limit, which is 0. The error in the thinking of the person was using 0.1 as an input instead of finding the input that would result in an output of 0.1. After solving for this input, they were able to correctly determine the range of inputs that would satisfy the given condition.
  • #1
mnzavislan
3
0

Homework Statement



Consider f(x)=x^2.5. Note that limf(x) as x->0+ =0. The input must be less than ___ from 0 to guarantee the output is within 0.1 of the limit.

Homework Equations



N/A

The Attempt at a Solution

 
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  • #2
What have you tried?

Where are you stuck ?
 
  • #3
If I'm correct, the output can be 0.1 and -0.1. So I have computed:
f(0.1)= 0.00316 and f(-0.1)= -0.00316
These are the inputs that guarantee the output to be within 0.1 of the limit, 0. However, I think there is an error in my thinking somewhere.
 
  • #4
You used 0.1 as an input.

Solve f(x-0) = 0 + 0.1 for x.
 
  • #5
Ohhh okay! Got it. Thank you so much.
 

1. What is a tolerance limit for a function?

A tolerance limit for a function is a value that represents the maximum distance from the true value of the function at a given point. It is used to measure the accuracy of an approximation.

2. How do you find the tolerance limit for a given function?

To find the tolerance limit for a given function, you need to evaluate the function at a certain point and determine the maximum distance between the true value and the approximation. This can be done by using the formula: Tolerance limit =|f(x)-f(a)| where f(x) is the function and f(a) is the approximation at point a.

3. What is the tolerance limit for f(x)=x^2.5 near 0?

The tolerance limit for f(x)=x^2.5 near 0 is the maximum distance between the true value of the function and its approximation at the point x=0. This can be calculated by evaluating the function at x=0 and determining the maximum distance from the true value.

4. Why is it important to find the tolerance limit for a given function?

Finding the tolerance limit for a given function is important because it allows us to measure the accuracy of our approximation. It helps us determine how close our approximation is to the true value of the function and how much error we can expect in our calculations.

5. How does the tolerance limit change as the point of evaluation moves closer to the true value of the function?

The tolerance limit decreases as the point of evaluation moves closer to the true value of the function. This is because as the distance between the approximation and the true value decreases, the accuracy of the approximation increases, resulting in a smaller tolerance limit.

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