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sktjell

The reciprocal function f(x)=1/x satisfies which of the following statements? Check all that apply.. A. It exhibits inverse variation. B. Its range is all real numbers. C. It exhibits direct variation. D. Its domain is all real numbers except for zero.

  • one year ago
  • one year ago

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  1. imagreencat
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    Go to the choices one by one. Do you think A is correct?

    • one year ago
  2. sktjell
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    I dont understand what any of them mean, so i couldnt tell you, im really slow in math, :'(

    • one year ago
  3. experimentX
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    Jeez .... you are trying to tackle question without knowing what there terms are??

    • one year ago
  4. sktjell
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    i just dont understand and i have so much to do! IM SO SORRY :(

    • one year ago
  5. experimentX
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    first search what what are direct variations and inverse variations ...

    • one year ago
  6. sktjell
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    ok

    • one year ago
  7. experimentX
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    http://www.youtube.com/watch?v=92U67CUy9Gc

    • one year ago
  8. sktjell
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    In an inverse variation, the values of the two variables change in an opposite manner - as one value increases, the other decreases.

    • one year ago
  9. sktjell
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    can u dumb that down for me ... :/

    • one year ago
  10. sktjell
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    @experimentX Im a senior i just finished school and 50 assigments with questions like these in them before june 3rd or i cant walk with my class on june 6th, This because i failed ceramics by 2 points because the teacher hatted me and gave me a failing grade, they then put me in a math class online like im doing now to help me fill in the half a credit i need to graduate so im begging you please give me the answer, i learned all this when i was a freshman but i havent done it in a while i have so much to do in so little time and re learning things is just not ganna help PLEASE :(

    • one year ago
  11. experimentX
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    I suggest you focus on learning ... what will you do with answers if you don't know that they mean?

    • one year ago
  12. experimentX
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    finish that video ... i'll give you half answer

    • one year ago
  13. sktjell
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    omg :'( this only question 4 of this stupid thing ive been on here for hours, and im only on question 4! ill never get this done in a week. (Sigh) i appreciate your help, but im sorry, watching a 9 minute video does not help me with time, i need to finish this fast. Thanks i really appreciate it though u also helped me on other questions which i do appreciate. I REALLY DO.

    • one year ago
  14. imagreencat
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    Well, it says that inverse variation involves two quantities wherein as the other one increases, the other decreases. Take for example: 8 workers paint a house for 5 days; 10 workers paint the house for 2 days. Since there are more workers, the work could be done in a shorter time. That's inverse variation. Do you somehow get it?

    • one year ago
  15. sktjell
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    okay yea.

    • one year ago
  16. experimentX
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    so what do you think ??? does f(x) increase or decrease with x??

    • one year ago
  17. sktjell
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    increase?

    • one year ago
  18. experimentX
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    f(1) = 1/1 = 1 f(10) = 1/10 = 0.1 do you think it is increasing

    • one year ago
  19. imagreencat
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    Well, with the denominator increasing, what do you think will happen to the quotient of 1 and the increasing denominator?

    • one year ago
  20. imagreencat
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    Just think of it this way, the number 1 is divided into greater and greater parts. So great that it will reach infinity! Do you now think it is still increasing?

    • one year ago
  21. sktjell
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    ooh no its decreasing

    • one year ago
  22. sktjell
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    its breaking up into smaller numbers to make a bigger number

    • one year ago
  23. experimentX
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    well ... this is called inverse variation!!

    • one year ago
  24. sktjell
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    okay so is that it?

    • one year ago
  25. experimentX
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    half part

    • one year ago
  26. imagreencat
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    Yes, well A is correct. Go check the other ones. Tell us what you think of each option.

    • one year ago
  27. experimentX
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    since it's inverse variation ... it cannot be direct variation now two option left

    • one year ago
  28. sktjell
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    i think b is right

    • one year ago
  29. experimentX
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    don't make guess ... i'm not gonna answer

    • one year ago
  30. experimentX
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    first search for what's "real number"

    • one year ago
  31. sktjell
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    B IS RIGHT BECAUSE IT DOES HAVE REAL NUMBERS DOSENT IT

    • one year ago
  32. sktjell
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    i know what real numbers are, they are every number basically

    • one year ago
  33. experimentX
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    is pi a real number??

    • one year ago
  34. experimentX
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    is 1 and 10 real number??

    • one year ago
  35. sktjell
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    yes

    • one year ago
  36. experimentX
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    *are ...

    • one year ago
  37. experimentX
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    is 0 real number??

    • one year ago
  38. sktjell
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    yes

    • one year ago
  39. experimentX
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    find f(x) at 0

    • one year ago
  40. sktjell
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    its not there

    • one year ago
  41. imagreencat
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    Why is it not there?

    • one year ago
  42. imagreencat
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    Because..

    • one year ago
  43. sktjell
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    listen guys i appreciate you guys tring to teach me but again, this is question 4 and weve been doing this for about 20 minutes now. i still have 6 more questions to do and then after that i have 50 more quizes like this to do in 7 days. so ill just guess and fail like i did before but i really apprciate you guys helping me with the last answer.

    • one year ago
  44. experimentX
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    ah ... i misread ... i thought it was domain

    • one year ago
  45. sktjell
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    honestly i would have sat there and learned it but i just dont have the time

    • one year ago
  46. experimentX
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    okay ... the range is all over the real numbers now we have only one statement

    • one year ago
  47. sktjell
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    I GUESSED A B AND D THANKS GUYS.

    • one year ago
  48. imagreencat
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    The range can't be zero. So the range is not all real numbers.

    • one year ago
  49. experimentX
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    i'm still not sure if you can consider infinity to be real numbers or not generally ... i have said lim x->inf 1/x = 0

    • one year ago
  50. imagreencat
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    Well yeah. But as far as I can remember, my calc teacher told me that infinity is not a number. That's why you can't close bracket the infinity sign. :)

    • one year ago
  51. experimentX
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    I guess you are right http://en.wikipedia.org/wiki/Extended_real_number_line there's been a long debate on infinity ... observing it only made me confused still ... lim x-> inf ... will never make 0 on range

    • one year ago
  52. experimentX
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    well ... A and D are your answer

    • one year ago
  53. imagreencat
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    Yup! =)) Cause that is just the limit and we are not actually sure if it will be 0.

    • one year ago
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