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anonymous

  • 5 years ago

f(x)=-2/x^2+2x-3 Determine the domain of the function

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  1. anonymous
    • 5 years ago
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    domain is negative infinity to infinity but there should be some vertical asymptotes in there so it is not continuously from negative infinity to infinity. gimme a sec

  2. dumbcow
    • 5 years ago
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    x cannot be 0

  3. anonymous
    • 5 years ago
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    no dumbcow, x cannot be -3 or 1

  4. anonymous
    • 5 years ago
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    domain should be x not equal to -1 or -3 i.e R-{-1,-3}

  5. anonymous
    • 5 years ago
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    oh whoa nevermind didnt see the negative sign in front of the 2

  6. anonymous
    • 5 years ago
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    and R here is the set of real numbers:)

  7. anonymous
    • 5 years ago
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    got it?

  8. anonymous
    • 5 years ago
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    x cannot be 0 thats it so all real numbers except when x is 0

  9. anonymous
    • 5 years ago
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    I'm trying. lol. Thank you for explaining; I sure do appreciate it. Got tons of this stuff to help someone else out.

  10. anonymous
    • 5 years ago
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    it doesnt make sense even if x=0 as there is a '-3' in th e denominator ...lol

  11. anonymous
    • 5 years ago
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    this is unbelievable i must be drunk final answer is all real numbers except when x equals to 1 or -3

  12. anonymous
    • 5 years ago
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    All numbers except wen x=-1 or -3....

  13. anonymous
    • 5 years ago
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    of course x can equal to 0!!!!!!

  14. anonymous
    • 5 years ago
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    no its 1 or -3 not -1 or -3

  15. dumbcow
    • 5 years ago
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    haha sorry you guys didnt read the problem correctly

  16. anonymous
    • 5 years ago
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    yes it can be =0

  17. anonymous
    • 5 years ago
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    yep

  18. anonymous
    • 5 years ago
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    @dumbcow haha i hadnt the first time around either

  19. anonymous
    • 5 years ago
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    now did u get it??

  20. anonymous
    • 5 years ago
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    hello anybody there??

  21. anonymous
    • 5 years ago
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    yes

  22. anonymous
    • 5 years ago
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    so u got what i typed above?

  23. anonymous
    • 5 years ago
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    Okay, so the domain is not (-inf, inf).....

  24. anonymous
    • 5 years ago
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    no its not

  25. anonymous
    • 5 years ago
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    So it's all real numbers except when x=0

  26. anonymous
    • 5 years ago
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    no...its all real nos. except wen x=-1 or x=-3

  27. anonymous
    • 5 years ago
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    now , is it alright?

  28. anonymous
    • 5 years ago
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    Yes, thank you

  29. anonymous
    • 5 years ago
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    you're welcome @JJ

  30. anonymous
    • 5 years ago
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    So, if I had [f(x)=\sqrt{5-x}\] , would that mean, the Domain would be all real numbers? Just making sure I got that one right.I'm assuming this because I can plug anything in there.

  31. anonymous
    • 5 years ago
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    no x cannot equal any negative number in that caase

  32. anonymous
    • 5 years ago
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    u can plug anything there except the number/numbers that make the denominator go '0'

  33. anonymous
    • 5 years ago
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    and yeah , sqrt can't be negative so u have to remeber that:) so domain wud be numbers<5

  34. anonymous
    • 5 years ago
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    So, all real number <5

  35. anonymous
    • 5 years ago
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    thinker i think youre a bit confused. x can equal indeed to 5, that would just mean y equals 0. The domain is R = (0,infinity)

  36. anonymous
    • 5 years ago
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    I sure am confused. So sorry.

  37. anonymous
    • 5 years ago
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    JJSONFIRE i am really off it today listen to thinker im wrong

  38. anonymous
    • 5 years ago
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    Hey, trust me I understand.

  39. anonymous
    • 5 years ago
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    yep youre right

  40. anonymous
    • 5 years ago
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    hey ....if its(),infinity) that wud make the sqrt tern negative which is not Real!!

  41. anonymous
    • 5 years ago
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    i know you do im admitting that im wrong. im tired but still willing to help

  42. anonymous
    • 5 years ago
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    i just explained to you that i made a mistake

  43. anonymous
    • 5 years ago
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    ive been working all day..... :/

  44. anonymous
    • 5 years ago
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    yeah..thats ok...im tired too...nevermind

  45. anonymous
    • 5 years ago
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    Do you think you guys could help me with one more..please

  46. anonymous
    • 5 years ago
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    sure

  47. anonymous
    • 5 years ago
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    This set of problems says I need to determine if "f" is defind by f(x)=2x^2+5. The problems are f(-2)............next is f(3x)............last is -f(x)............Please, explain the best you can ...i'm lost..the book is useless with explanations

  48. anonymous
    • 5 years ago
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    just plug in -2 in the first one as it says "f(-2)"...in place of x & u will get the answer:) its simple:)

  49. anonymous
    • 5 years ago
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    Wow, so i was right. Woohoo..

  50. anonymous
    • 5 years ago
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    and similarly for the rest...if it says f(3x) then plug in '3x' in place of 'x' got it?

  51. anonymous
    • 5 years ago
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    ohh u were..?? good:)

  52. anonymous
    • 5 years ago
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    now i gotta go...bye...hope i helped u:)

  53. anonymous
    • 5 years ago
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    i've been at this all night...not sure whats been right and whats been wrong.

  54. anonymous
    • 5 years ago
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    ohh..dont worry thats how u learn, right?

  55. anonymous
    • 5 years ago
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    ACtually, the one with the negative f...not so sure actually

  56. anonymous
    • 5 years ago
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    hmm..np...bye for now:)

  57. anonymous
    • 5 years ago
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    -f(x)....how in the world...Is it as simple as just writing that out?

  58. anonymous
    • 5 years ago
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    hmmm yupp:)

  59. anonymous
    • 5 years ago
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    Thank you sooooooooooo much.

  60. anonymous
    • 5 years ago
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    ohhhhh:):) youre welcome:) hope i help u next time too:)

  61. anonymous
    • 5 years ago
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    Oh, I have 2 more sets to finish that are different...need to finish them today. I am helping someone who seriously needs the help that will never use this stuff, so i'lm trying my very best to help them. Its very important it gets done right you know.

  62. anonymous
    • 5 years ago
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    hmm yeah...but i am really tired:(:( sry:(:( gotta go...next time..

  63. anonymous
    • 5 years ago
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    Thank you. Nite.

  64. anonymous
    • 5 years ago
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    gud nite:):) n byee

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