- #1
josueortega
- 8
- 0
Hi!
I need some help here, please.
In Principles of Mathematical Analysis, Rudin prove the uniqueness of the n-root on the real numbers. For doing so, he prove that both $y^n < 0$ and that $y^n > 0$ lead to a contradiction.
In the first part of the proof, he chooses a value $h$ such that
1. $0<h<1$
2 $h<\frac{x-y^n}{n(y+1)^(n-1)}$
My question is: how does he know such a value $h$ exists?
I know this value is positive, but I am not sure how to prove is less than 1.
To add some context:
x is a real positive number
n is a integer positive number
y is a real positive number
If someone can help me with this, I will be very grateful!
Thanks
I need some help here, please.
In Principles of Mathematical Analysis, Rudin prove the uniqueness of the n-root on the real numbers. For doing so, he prove that both $y^n < 0$ and that $y^n > 0$ lead to a contradiction.
In the first part of the proof, he chooses a value $h$ such that
1. $0<h<1$
2 $h<\frac{x-y^n}{n(y+1)^(n-1)}$
My question is: how does he know such a value $h$ exists?
I know this value is positive, but I am not sure how to prove is less than 1.
To add some context:
x is a real positive number
n is a integer positive number
y is a real positive number
If someone can help me with this, I will be very grateful!
Thanks