Proving the Limit of (x^2)(sin y)^2)/(x^2+2y^2) at (0,0) without Squeeze Theorem

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In summary, the limit of (x^2)(sin y)^2)/(x^2+2y^2) at (0,0) is equal to 0 and can be proven using the epsilon-delta definition of a limit and algebraic manipulation. Proving limits is important in calculus to understand function behavior and there are other methods besides the Squeeze Theorem, such as algebraic limit laws, the epsilon-delta definition, and L'Hopital's rule.
  • #1
chaose
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Is there anyway to show that the limit for ((x^2)(sin y)^2)/(x^2+2y^2) exists without using the squeeze theorem? I was thinking about the episilon-delta definition of the limit.sorry, I forgot the values.
limit (x,y) -> (0,0) of ((x^2)(sin y)^2)/(x^2+2y^2)
 
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  • #2
chaose said:
Is there anyway to show that the limit for ((x^2)(sin y)^2)/(x^2+2y^2) exists without using the squeeze theorem? I was thinking about the episilon-delta definition of the limit.

You forgot to specify the 'variable -> value' part.
 
  • #3
Convert to polar coordinates.
 

1. What is the limit of (x^2)(sin y)^2)/(x^2+2y^2) at (0,0)?

The limit of (x^2)(sin y)^2)/(x^2+2y^2) at (0,0) is equal to 0.

2. How can the limit be proven without using the Squeeze Theorem?

The limit can be proven by using the epsilon-delta definition of a limit and algebraic manipulation.

3. What is the importance of proving limits in calculus?

Proving limits is important in calculus because it allows us to understand the behavior of a function near a specific point, which is crucial in determining the continuity and differentiability of a function.

4. Can the Squeeze Theorem be used to prove all limits?

No, the Squeeze Theorem can only be used to prove limits when the function is "sandwiched" between two other functions whose limits are known.

5. Are there any other methods to prove limits besides the Squeeze Theorem?

Yes, besides the Squeeze Theorem, other methods to prove limits include the algebraic limit laws, the epsilon-delta definition, and L'Hopital's rule.

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