Finding the Limit of g(x) and r(x) as x Approaches a Specific Value

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In summary, the conversation discusses finding the limit of a function, specifically g(x) and r(x), as x approaches a certain value or infinity. The speaker also suggests using a property about limits and asks about the definition of a limit.
  • #1
jessyca_lynne
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let g(x)= (x-3)sin(1/(x-3))+2. Determin ethe limit by any means possible as x-->3.


let r(x)=2+((sinx)/x)
find the limit of r(x) as x aproaches infinity

make a conjecture about the limit of r(x) as x approaches zero. give evidence to support your conjecture.
 
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  • #2
What have you done so far?
 
  • #3
i don't know where to begin!
 
  • #4
jessyca_lynne said:
let g(x)= (x-3)sin(1/(x-3))+2. Determin ethe limit by any means possible as x-->3.


let r(x)=2+((sinx)/x)
find the limit of r(x) as x aproaches infinity

make a conjecture about the limit of r(x) as x approaches zero. give evidence to support your conjecture.

I suggest you use [tex]lim_{x\rightarrow a}(F(x)\cdot G(x))=lim_{x\rightarrow a} F(x) \cdot lim_{x\rightarrow a}G(x)[/tex].
 
  • #5
Well, do you know the definition of what it means to say

[tex]\lim_{x \rightarrow a} f(x) = L,[/tex]

or

[tex]\lim_{x \rightarrow \infty} f(x) = L[/tex]

?
 
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  • #6
radou said:
I suggest you use [tex]lim_{x\rightarrow a}(F(x)\cdot G(x))=lim_{x\rightarrow a} F(x) \cdot lim_{x\rightarrow a}G(x)[/tex].

This only works if both limits exist!
 
Last edited:

1. What does it mean to find the limit of a function as x approaches a specific value?

Finding the limit of a function as x approaches a specific value means determining the value that the function approaches as x gets closer and closer to the specified value. It helps us understand the behavior of a function at a particular point and can be used to solve various mathematical problems.

2. How is the limit of a function calculated?

The limit of a function can be calculated using various methods, such as direct substitution, factoring, and using L'Hôpital's rule. It involves evaluating the function at values closer and closer to the specified value and observing the trend in the output values. In some cases, a graph or a table of values can also help in determining the limit.

3. What is the difference between the limit of a function and the value of the function at a specific point?

The limit of a function at a specific point is the value that the function approaches as x gets closer and closer to that point. On the other hand, the value of the function at a specific point is the actual output of the function when the input is that particular point. While the limit may or may not be equal to the value of the function at a point, they both provide valuable information about the behavior of the function.

4. Why is it important to find the limit of a function?

Finding the limit of a function is essential in understanding the behavior of the function at a particular point. It can help us determine if a function is continuous, identify vertical and horizontal asymptotes, and solve various mathematical problems. It is also a fundamental concept in calculus and is used to define derivatives and integrals.

5. Can the limit of a function at a point be undefined?

Yes, the limit of a function at a point can be undefined. This can happen when the function has a vertical asymptote or when the left and right-hand limits approach different values. It can also occur when the function is undefined or has a jump discontinuity at that point. In such cases, we say that the limit does not exist.

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