Convergence and Divergence in Integrals: Exploring Rational Functions

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In summary, the conversation discusses the integral of 2/(x-6)^2 from 0 to 8 and the potential issue of a number between 0 and 8 causing problems. It also questions the possibility of the integral being negative when the integrand is positive. The solution is found to be an asymptote at x=6, which should always be considered when working with rational functions.
  • #1
graycolor
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integral 2/(x-6)^2 respects to x from 0 to 8. Shouldn't the answer to this be converges and is =-4/3. The true answer to this is it diverges towards infinity... can someone please explain.
 
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  • #2
Two things to consider:

1. isn't there a number between [tex] 0 [/tex] and [tex] 8 [/tex] that could cause a problem?

2. The integrand [tex] 2/{(x-6)^2}[/tex] is positive throughout the interval of integration,
so how could the integral be negative?
 
  • #3
I think I've found the problem there should be an asymptote when x=6. My teacher never taught me to look for these.
 
  • #4
Whether you are graphing, integrating, differentiating, or simply contemplating the function and its domain for their inherent beauty :rofl: you should always look for the possible existence, and influence of, an asymptote for rational functions.
 

1) What does it mean for a limit to diverge or converge?

When we say a limit diverges, it means that the values of the function are increasing or decreasing without bound as the input approaches a specific value. On the other hand, a limit converges when the values of the function approach a specific finite value as the input approaches a certain value.

2) How do you determine if a limit diverges or converges?

To determine if a limit diverges or converges, we can use various methods such as the comparison test, the ratio test, or the root test. These tests help us determine the behavior of a function as the input approaches a specific value.

3) Can a limit both diverge and converge?

No, a limit can only either diverge or converge. It cannot do both at the same time.

4) What is the significance of a limit diverging or converging?

The behavior of a limit can provide important information about the function itself. For example, if a limit diverges, it may indicate that the function has a vertical asymptote or an infinite discontinuity at that specific value of the input. On the other hand, if a limit converges, it may indicate that the function is continuous and well-behaved at that specific value.

5) Can a limit diverge or converge at more than one point?

Yes, a limit can diverge or converge at more than one point. This depends on the behavior of the function at different values of the input. For example, a function may have a vertical asymptote at one value and converge at another value, indicating different behaviors at different points.

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