Unique Solution Exists to x^n=y: Real Analysis Proof

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In summary, a unique solution in real analysis is a solution that is one-of-a-kind and cannot be duplicated. To prove that a unique solution exists, various mathematical techniques can be used such as induction, contradiction, or direct proof. In real analysis, an equation can only have one unique solution, and it can be irrational or complex. Other conditions that need to be met for a unique solution to exist include a well-defined equation with a clear domain and range, and a unique solution for all possible values of the variable.
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Homework Statement


Given x > 0 and [tex]n \in N[/tex], prove that there is a unique y > 0 s.t. [tex]y^n = x[/tex] exists and is unique

Homework Equations


Hint is given: consider [tex]y = 1. u.b. \{s \in R : s^n < x\} [/tex]

The Attempt at a Solution


I'm not used to this style of proof (real analysis I), help would be appreciated, thanks. BTW, what does "u.b." signify?
 
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  • #2
It's actually l.u.b. with a letter "L" instead of a digit "1". It means "least upper bound. Does that help?
 
  • #3
oh, now its clearer. thanks
 

FAQ: Unique Solution Exists to x^n=y: Real Analysis Proof

What is the definition of a unique solution in real analysis?

In real analysis, a unique solution refers to a solution that is one-of-a-kind and cannot be duplicated or replicated. This means that there is only one possible value that satisfies the given equation or problem.

How can we prove that a unique solution exists to x^n=y in real analysis?

To prove that a unique solution exists to x^n=y in real analysis, we can use various mathematical techniques such as induction, contradiction, or direct proof. These methods involve logically reasoning through the problem and providing evidence to show that there is only one possible solution.

Is it possible for an equation to have more than one unique solution?

No, in real analysis, an equation can only have one unique solution. This is because the concept of uniqueness is based on the idea that there is only one possible value that satisfies the given equation.

Can unique solutions be irrational or complex numbers?

Yes, unique solutions can be irrational or complex numbers. In real analysis, unique solutions do not have to be rational or real numbers. As long as there is only one possible value that satisfies the equation, it is considered a unique solution.

Are there any other conditions that need to be met for a unique solution to exist in real analysis?

Yes, there are other conditions that need to be met for a unique solution to exist in real analysis. These conditions may vary depending on the specific problem or equation, but generally, the equation should be well-defined and have a clear domain and range. Additionally, the solution should be unique for all possible values of the variable.

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