Can the Inequality $x,y,z>1$ be Proven with a Hint of 48?

In summary, "Proof of an inequality" is a technique in mathematics used to compare the sizes of two quantities and establish relationships between them. It is crucial in fields such as physics, economics, and engineering, and involves using mathematical principles and logical reasoning to show that one expression is always greater than or less than another. The key elements of a "Proof of an inequality" include clearly stating the inequality, providing a rigorous argument, and using appropriate mathematical techniques. It also has practical applications in real-world situations.
  • #1
Albert1
1,221
0
$x,y,z>1$

please prove :

$\dfrac{x^4}{(y-1)^2}+\dfrac{y^4}{(z-1)^2}+\dfrac{z^4}{(x-1)^2}\geq 48$
 
Last edited:
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  • #2
Albert said:
$x,y,z>1$

please prove :

$\dfrac{x^4}{(y-1)^2}+\dfrac{y^4}{(z-1)^2}+\dfrac{z^4}{(x-1)^2}\geq 48$
hint:
prove :$\dfrac{x^4}{(y-1)^2}\geq 32(x-y)+16$
 
  • #3
Albert said:
hint:
prove :$\dfrac{x^4}{(y-1)^2}\geq 32(x-y)+16$
$\dfrac{x^4}{(y-1)^2}+16(y-1)+16(y-1)+16\geq 4\sqrt[4]{16^3x^4}= 32x$
or :$\dfrac{x^4}{(y-1)^2}\geq 32(x-y)+16$
please complete the rest
 

FAQ: Can the Inequality $x,y,z>1$ be Proven with a Hint of 48?

What is "Proof of an inequality"?

"Proof of an inequality" is a technique used in mathematics to show that one mathematical expression is less than or greater than another. It is commonly used to compare the sizes of two quantities or to show that one quantity is always smaller or larger than another.

Why is "Proof of an inequality" important?

"Proof of an inequality" is important because it allows us to make precise comparisons between quantities and to establish relationships between them. This is crucial in many fields of science, such as physics, economics, and engineering, where accurate and rigorous analysis is essential.

How do you prove an inequality?

The proof of an inequality involves using mathematical principles and logical reasoning to show that one expression is always greater than or less than another. This can be achieved through various methods, such as algebraic manipulation, calculus, or mathematical induction.

What are the key elements of a "Proof of an inequality"?

The key elements of a "Proof of an inequality" include clearly stating the inequality to be proved, providing a logical and rigorous argument, and using appropriate mathematical techniques and principles. It is also important to clearly define any variables or terms used in the proof.

Can "Proof of an inequality" be used in real-world applications?

Yes, "Proof of an inequality" has many practical applications in fields such as economics, physics, and engineering. It can be used to analyze and compare data, make predictions, and solve real-world problems involving quantities and their relationships.

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