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Alexis1994_13

  • 4 years ago

when 2 vectors are parallel what we have ? I mean vector AB//BC= ?

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  1. amistre64
    • 4 years ago
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    we have 2 vectors the differ by at most a scalar

  2. Alexis1994_13
    • 4 years ago
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    AB*BC=0 ?

  3. amistre64
    • 4 years ago
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    does dotting parallel vectors produce a 0? they aint orthogonal that I can recall

  4. amistre64
    • 4 years ago
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    0,1 0,1 ---- 0+1 = 1 0,1 0,-1 ---- 0-1 = -1

  5. amistre64
    • 4 years ago
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    3 , 4 -3,-4 ----- -9-12 = -18

  6. Alexis1994_13
    • 4 years ago
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    AB+BC=-1 ?

  7. amistre64
    • 4 years ago
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    adding vectors produces another vector, not a scalar

  8. amistre64
    • 4 years ago
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    youre gonna have to provide more verbiage if I am to understand what it is your asking :)

  9. amistre64
    • 4 years ago
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    that and 4.-4 = -16 ... not -12 lol

  10. Alexis1994_13
    • 4 years ago
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    I have the vectors AB(2,6) and BC(2K-2 , 5K-4) And I need to prove that those vectors are parallel. How I will do that?

  11. Alexis1994_13
    • 4 years ago
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    I mean,I need to find fot wich k those vectors are parallel.

  12. amistre64
    • 4 years ago
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    when they differ by only a scalar; by a multiplicative factor. 2 = 2k-2 and 6 = 5k-4

  13. estudier
    • 4 years ago
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    You could test values of k--

  14. amistre64
    • 4 years ago
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    4 = 2k; k=2 10 = 5k; k=2 right? so when k=2; that is one possible option for parallel

  15. Alexis1994_13
    • 4 years ago
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    then we have AB//BC <=> AB = BC

  16. amistre64
    • 4 years ago
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    when ab = bc; they are parallel; but thats not the only case ...

  17. amistre64
    • 4 years ago
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    if you can determine the angle that the vectors span from each other; then you can prove if they are parallel or not as well :) 180 and 0 are parallel vectors

  18. estudier
    • 4 years ago
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    normal to one is normal to the other...

  19. Alexis1994_13
    • 4 years ago
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    okay,I got it :D Thank ya a lot.

  20. amistre64
    • 4 years ago
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    2 , 6 2k-2, 5k-4 ----------- 4k-4 + 30k-24 = 34k -28 ..... :)

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