Hello Could you me demostrate some integral inequalities?

In summary, the conversation is about demonstrating inequalities without calculating the integral. The person asking for help has tried to approach the problem by writing 1/3 as the result of an integral from 4 to 7, or 1, but with no results. They have also tried breaking down the fraction, but it did not lead to a solution. Another person suggests showing that the integrand always lies between 1/9 and 1/3 to solve the problem.
  • #1
TheDoctor46
14
0
So could you please help me demonstrate some inequalities? Please! They want to prove them without calculating the integral.

1/3<=integral from 4 to 7 (x−3)/(x+5)dx<=1Thanks!
 
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  • #2
This is a homework-style question, so by the rules of the forum you need to demonstrate some sort of attempt at solving the problem yourself before we can help you.

What have you tried so far? Do you know any theorems which may be useful here?
 
  • #3


I tried writing 1/3 as the result of an integral from 4 to 7, or 1, but wirh no results. I also tried breaking the fraction, but also, it led nowhere.
 
  • #4
1/3= (1/9)(7- 4) and 1= (1/3)(7- 4) so if you can show that the integrannd always lies between 1/9 and 1/3, you are done.
 

FAQ: Hello Could you me demostrate some integral inequalities?

What is an integral inequality?

An integral inequality is a mathematical statement that compares the value of an integral (area under a curve) to another value, such as a constant or another integral. It is used to establish relationships between different functions or to evaluate the convergence of integrals.

What are some examples of integral inequalities?

Some common examples of integral inequalities include the Cauchy-Schwarz inequality, the Hölder inequality, and the Minkowski inequality. These are all used to compare the integrals of different functions or to estimate the value of an integral.

How are integral inequalities used in science?

Integral inequalities are used in various fields of science, including physics, engineering, and economics. They are particularly useful in calculating probabilities, estimating error bounds, and analyzing the convergence of numerical methods.

Are there any special techniques for solving integral inequalities?

Yes, there are several techniques for solving integral inequalities, such as using transformations, applying the Cauchy-Schwarz inequality, or using special functions like the Gamma function. It is important to carefully choose the appropriate technique for a specific inequality to obtain an accurate solution.

Are there any common mistakes when using integral inequalities?

Yes, some common mistakes when using integral inequalities include using incorrect limits of integration, applying the wrong inequality, or not considering the equality case. It is important to carefully check the conditions and assumptions of an inequality and to double-check all calculations to avoid errors.

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