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IsTim

  • 4 years ago

Given each scalar equation, write a vector equation. x=8

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  1. IsTim
    • 4 years ago
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    I was thinking that the normal vector was [8,0] and that the direction vector was [0,-8] and the position vector was [8,0].

  2. IsTim
    • 4 years ago
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    I was wrong.

  3. IsTim
    • 4 years ago
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    My final answer was [x,y]=[8,0]+t[0,-8]. But I am wrong.

  4. IsTim
    • 4 years ago
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    MYsesshou, are you my savior in this dark time?

  5. IsTim
    • 4 years ago
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    Assassin, are you able to assist me?

  6. mysesshou
    • 4 years ago
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    Actually, I'm not quite sure. Sorry !! Sorry for lag. I have been fighting my computer and this site for like an hour.

  7. IsTim
    • 4 years ago
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    I think everyone has. Ok. Oh well.

  8. mysesshou
    • 4 years ago
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    was that the only info you're given?

  9. IsTim
    • 4 years ago
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    Yes. Alongside the info in the textbook explaining how to do this.

  10. mysesshou
    • 4 years ago
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    I'm still searching, but can you apply something like this? http://www.blurtit.com/q1900770.html (google'd) I don't have your book... is it a calc book?

  11. IsTim
    • 4 years ago
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    I dunno. Yes, it is a Calculus and Vectors book.

  12. IsTim
    • 4 years ago
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    Are you able to help?

  13. mysesshou
    • 4 years ago
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    Probably not, but I've been searching

  14. IsTim
    • 4 years ago
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    I'll rally up others just in case.

  15. mysesshou
    • 4 years ago
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    Sorry, it's just been too long for me for this to be recalled.

  16. IsTim
    • 4 years ago
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    Yeah. Happened to me when I was helping someone else on inequalities.

  17. IsTim
    • 4 years ago
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    @Zarkon Uh, someone told me to ask you.

  18. PaxPolaris
    • 4 years ago
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    why is your answer wrong?

  19. IsTim
    • 4 years ago
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    The actual answer is [x,y]=[8,2]+t[0,1].

  20. IsTim
    • 4 years ago
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    Any clue?

  21. IsTim
    • 4 years ago
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    I've double-checked to make sure the facts are right.

  22. PaxPolaris
    • 4 years ago
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    the -8 isn't necessary but acceptable.... both your eq. and answer equation are acceptable...

  23. PaxPolaris
    • 4 years ago
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    direction vector can be any vertical vector... starting point postion vector can refer to any point on line Infinite acceptable answers.

  24. IsTim
    • 4 years ago
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    Like, I know that [8,0] can be anything, but my answer still isn't right in terms of t[0,1].

  25. mysesshou
    • 4 years ago
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    Sorry IsTim, I've searched through my calc book and solutions manual, but I guess 8-9 years is too long to remember enough of this. Hope PaxPolaris is able to help you understand. :)

  26. PaxPolaris
    • 4 years ago
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    direction vector can be any vertical vector ... [0,1] and [0,-8] are both parallel to the line so both are acceptable ... any vector [0,C] is acceptable.

  27. IsTim
    • 4 years ago
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    Wait, you're sure you're not talking about position vector?

  28. PaxPolaris
    • 4 years ago
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    no, we're done with that...??

  29. IsTim
    • 4 years ago
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    I don't know, they way you describe the direction vector sounds like the way my teacher described a position vector.

  30. PaxPolaris
    • 4 years ago
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    Position Vector: of any 1 point on the line Direction Vector: any vector parallel to the line

  31. IsTim
    • 4 years ago
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    But then what's the constant?

  32. PaxPolaris
    • 4 years ago
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    the slope of the direction vector is constant ... the length of the direction vector is irrelevant

  33. IsTim
    • 4 years ago
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    Ok. I'll just leave this question as is for now. Thanks for the help anyways, PAx.

  34. PaxPolaris
    • 4 years ago
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    eg. if your direction vector is [1,2]: it can also be [2,4] , [3,6], [-5,-10]....[n,2n] preferably you'd use the simplest form i.e. [1,2] or in your case [0,1] instead of [0,-8] http://www.netcomuk.co.uk/~jenolive/vect3.html

  35. IsTim
    • 4 years ago
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    Hey Sess, I'm good now. Thanks for staying though. I'll take a look at it Pax Polaris.

  36. mysesshou
    • 4 years ago
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    Evidently, my book wasn't good enough to help. I was reading through some of this, after p.4, that seemed that it might help some. http://mysite.science.uottawa.ca/vbozi013/mat1339/ch08.pdf PaxPolaris' site is good too :)

  37. mysesshou
    • 4 years ago
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    Yay PaxPolaris for the help !

  38. amistre64
    • 4 years ago
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    i think i missed the original problem as stated

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