Help Solving Integral Inequality: f to 1/f

In summary, the conversation discusses the integration of a function, f, that is bounded below and integrable. However, it is shown to not be true in the given example of f(x)=x on [0,1]. It is suggested that the question may have meant that 0<|f|<k for some constant k on [0,1], but it is clarified that this is not the case. The original question is deemed to be false and it is requested for the problem to be stated accurately.
  • #1
shegiggles
3
0
I really need help on this. Completely lost. Please help me.
Let f: [a,b] -> R. Given f is integrable and bounded below, show 1/f is integrable.
 
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  • #2
It's not true. What about f(x)=x on [0,1]?
 
  • #3
Well, perhaps he meant that 0<|f|<k, on [0,1] for some constant k?
 
  • #4
Erm, arildno, you should reread that. (k=1...).
 
  • #5
matt grime said:
Erm, arildno, you should reread that. (k=1...).

can you please help me with this problem?
Thanks
 
  • #6
We can't because we have shown the question to be false.
 
  • #7
It would help if you would state exactly what the problem is. It cannot be what you originally wrote!
 

1. What is an integral inequality?

An integral inequality is an inequality that involves integrals, which are mathematical expressions that represent the area under a curve. These types of inequalities are often used to solve problems in calculus and other areas of mathematics.

2. How do you solve an integral inequality?

To solve an integral inequality, you first need to find the antiderivative of the given function. Then, you can use the properties of integrals to evaluate the integral and determine the area under the curve. Finally, you can use algebraic techniques to solve for the variable in the inequality.

3. What does f to 1/f mean in this context?

In this context, f to 1/f refers to the ratio of a function f to its inverse 1/f. This ratio can be used to evaluate inequalities involving the function f and its inverse.

4. Are there any specific techniques for solving integral inequalities?

Yes, there are several techniques that can be used to solve integral inequalities. These include using substitution, integration by parts, and applying the fundamental theorem of calculus. It is important to carefully choose the technique that best fits the given problem.

5. What are some real-world applications of integral inequalities?

Integral inequalities have many real-world applications in fields such as physics, engineering, and economics. They can be used to model and solve problems involving rates of change, optimization, and area under curves. For example, they can be used to determine the most efficient way to pack boxes in a shipping container or to calculate the maximum profit for a company.

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