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anonymous

  • 4 years ago

find the magnitude and component form of the vector 3AB 3(2,-1)(3,1) I know the magnitude is the 3sqrt of 5 but i dont know how to get the component form

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  1. anonymous
    • 4 years ago
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    a,b are what? co-rdinates? of what?

  2. anonymous
    • 4 years ago
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    The component form of the vector is the difference between the x and y coordinates, respectively. So in your case it is (3 - 2) for x and (1 - -1) for y, which gives (1, 4). The length of this vector can be calculated using Pythagora's theorem, and results in sqrt(5). And, finally, three times this is 3 sqrt(5).

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