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anonymous

  • 5 years ago

How do you know if integrals are improper?

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  1. anonymous
    • 5 years ago
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    if the function that you're integrating goes to infinity ^_^ I guess

  2. anonymous
    • 5 years ago
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    Okay! Do you know how to tell if they converge or diverge?

  3. anonymous
    • 5 years ago
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    if the answer = a finite number, then it converges, but if your answer = infinity , then it diverges ^_^

  4. anonymous
    • 5 years ago
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    no, it has infinity as one of the limits

  5. anonymous
    • 5 years ago
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    it doesnt "go to infinity" :\

  6. anonymous
    • 5 years ago
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    but this one also works, my professor said that, or maybe I was day dreaming again ._.

  7. anonymous
    • 5 years ago
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    or it could result in division by zero

  8. anonymous
    • 5 years ago
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    Basically, if there is an interval that you are integrating within, ie there are numbers on the top and bottom of the intendant, or the s looking thing, then it is proper. If there are no numbers, and it goes tninfinity, it's improper. You tell if it converges or diverges by seeing if any values cause the function to be indeterminate.

  9. anonymous
    • 5 years ago
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    that's what I meant elec, division by zero = infinity

  10. anonymous
    • 5 years ago
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    \[\int\limits_{-\infty}^{\infty } f(x) dx\] something like that

  11. anonymous
    • 5 years ago
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    Does that mean it's improper?

  12. anonymous
    • 5 years ago
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    or \[\int\limits_{0}^{1} \frac{e^x}{x}\]

  13. anonymous
    • 5 years ago
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    It's improper if there are no limits. The infinity is implied, so it's usually not written.

  14. anonymous
    • 5 years ago
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    there are two cases either the interval of integration is infinite or the function to be integrate becomes infinite at the given interval of integration

  15. anonymous
    • 5 years ago
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    so both of u guys elecengineer and sstrica r right

  16. anonymous
    • 5 years ago
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    lol uzma :)

  17. anonymous
    • 5 years ago
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    :)

  18. anonymous
    • 5 years ago
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    Thanks guys!

  19. anonymous
    • 5 years ago
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    yeh now I get what you me, but I dont like when people say that you get infinity when you divide by zero. Its not 100% mathematically correct, get your definitions in order :P

  20. anonymous
    • 5 years ago
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    np ^_^

  21. anonymous
    • 5 years ago
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    nothing is 100% , there's only 98% elec ^_^

  22. anonymous
    • 5 years ago
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    ?

  23. anonymous
    • 5 years ago
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    100% = perfection perfection doesn't exist, but it's good to seek it ^_^

  24. anonymous
    • 5 years ago
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    Wait .. so how do you know if it's converging or diverging again? Converging ends in an actual number and diverging goes to infinity or divides by zero?

  25. anonymous
    • 5 years ago
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    finite number = converge, infinite number = diverge

  26. anonymous
    • 5 years ago
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    It diverges if it has an asymptote.

  27. anonymous
    • 5 years ago
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    torch aren't you supposed to be in bed by now? Lol

  28. anonymous
    • 5 years ago
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    horizontal or vertical?

  29. anonymous
    • 5 years ago
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    Thats how you find if it goes to zero or infinity

  30. anonymous
    • 5 years ago
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    By using the asymptote?

  31. anonymous
    • 5 years ago
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    Either asymptote will cause a divergence. It doesn't matter if it is horizontal or vertical. And I'm going star! Lol gimme a medal and fan me, catch ya later! Lol

  32. anonymous
    • 5 years ago
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    What's a medal?

  33. anonymous
    • 5 years ago
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    Next to my name there's a button. You push it for the person that helped the most or a lot. Haha

  34. anonymous
    • 5 years ago
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    oh okayy

  35. anonymous
    • 5 years ago
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    Sweet! :) hope that answered your questions!

  36. anonymous
    • 5 years ago
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    It did!

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