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anonymous

  • one year ago

Find the specified vector or scalar. Show your work. u = -4i + 1j and v = 4i + 1j; Find .||u+v||

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  1. anonymous
    • one year ago
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    @freckles

  2. Kainui
    • one year ago
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    Find what?

  3. anonymous
    • one year ago
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    idk let me ask my teacher thats how the question was given to me

  4. anonymous
    • one year ago
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    ||u+v||

  5. anonymous
    • one year ago
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    @freckles

  6. freckles
    • one year ago
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    (ai+bj)+(ci+dj) =(a+c)i+(b+d)j then to find the magnitude of that sum you do \[\sqrt{(a+c)^2+(b+d)^2}\]

  7. anonymous
    • one year ago
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    ok this is my first time doing this soo

  8. anonymous
    • one year ago
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    i dont know what to do ?

  9. anonymous
    • one year ago
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    @mathmath333

  10. anonymous
    • one year ago
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    @freckles

  11. anonymous
    • one year ago
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    @skullpatrol

  12. freckles
    • one year ago
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    add the i-components

  13. freckles
    • one year ago
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    -4+4=?

  14. freckles
    • one year ago
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    then add the j-components 1+1=?

  15. freckles
    • one year ago
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    \[u+v=(-4+4)i+(1+1)j\]

  16. anonymous
    • one year ago
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    1+1= 2 and -4+40

  17. anonymous
    • one year ago
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    sorry -4+4=0

  18. freckles
    • one year ago
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    ok so you saying u+v=0i+2j or just u+v=2j

  19. freckles
    • one year ago
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    now how far is that from the origin ?

  20. freckles
    • one year ago
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    |dw:1438892786063:dw|

  21. anonymous
    • one year ago
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    like three away maybe more of two maybe

  22. freckles
    • one year ago
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    |dw:1438892855065:dw|

  23. anonymous
    • one year ago
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    zaro

  24. freckles
    • one year ago
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    1+1 =2

  25. anonymous
    • one year ago
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    opps i read that wrong my apologizes

  26. freckles
    • one year ago
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    you could have also used the formula above \[\sqrt{0^2+2^2}=\sqrt{0+4}=\sqrt{4}=2\]

  27. freckles
    • one year ago
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    but yeah 2j is just 2 units away from the origin

  28. freckles
    • one year ago
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    nj where n is a real number is just |n| units away from the origin

  29. freckles
    • one year ago
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    magnitude is just concerned how far something is from the origin

  30. anonymous
    • one year ago
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    ohh ok well thnx then thnx alot

  31. freckles
    • one year ago
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    np

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