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sktjell

  • 2 years ago

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.

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

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

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

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

  5. experimentX
    • 2 years ago
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    first search what what are direct variations and inverse variations ...

  6. sktjell
    • 2 years ago
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    ok

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

  8. sktjell
    • 2 years ago
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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.

  9. sktjell
    • 2 years ago
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    can u dumb that down for me ... :/

  10. sktjell
    • 2 years ago
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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 :(

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

  12. experimentX
    • 2 years ago
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    finish that video ... i'll give you half answer

  13. sktjell
    • 2 years ago
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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.

  14. imagreencat
    • 2 years ago
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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?

  15. sktjell
    • 2 years ago
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    okay yea.

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

  17. sktjell
    • 2 years ago
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    increase?

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

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

  20. imagreencat
    • 2 years ago
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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?

  21. sktjell
    • 2 years ago
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    ooh no its decreasing

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

  23. experimentX
    • 2 years ago
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    well ... this is called inverse variation!!

  24. sktjell
    • 2 years ago
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    okay so is that it?

  25. experimentX
    • 2 years ago
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    half part

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

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

  28. sktjell
    • 2 years ago
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    i think b is right

  29. experimentX
    • 2 years ago
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    don't make guess ... i'm not gonna answer

  30. experimentX
    • 2 years ago
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    first search for what's "real number"

  31. sktjell
    • 2 years ago
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    B IS RIGHT BECAUSE IT DOES HAVE REAL NUMBERS DOSENT IT

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

  33. experimentX
    • 2 years ago
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    is pi a real number??

  34. experimentX
    • 2 years ago
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    is 1 and 10 real number??

  35. sktjell
    • 2 years ago
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    yes

  36. experimentX
    • 2 years ago
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    *are ...

  37. experimentX
    • 2 years ago
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    is 0 real number??

  38. sktjell
    • 2 years ago
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    yes

  39. experimentX
    • 2 years ago
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    find f(x) at 0

  40. sktjell
    • 2 years ago
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    its not there

  41. imagreencat
    • 2 years ago
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    Why is it not there?

  42. imagreencat
    • 2 years ago
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    Because..

  43. sktjell
    • 2 years ago
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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.

  44. experimentX
    • 2 years ago
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    ah ... i misread ... i thought it was domain

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

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

  47. sktjell
    • 2 years ago
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    I GUESSED A B AND D THANKS GUYS.

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

  49. experimentX
    • 2 years ago
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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

  50. imagreencat
    • 2 years ago
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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. :)

  51. experimentX
    • 2 years ago
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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

  52. experimentX
    • 2 years ago
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    well ... A and D are your answer

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

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