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Alex17521 [72]
3 years ago
6

Write an expression for the vector difference a⃗ −b⃗ using unit vectors.

Mathematics
1 answer:
wel3 years ago
5 0
A vector A with components a, b, c can be written as (a, b, c) or in terms of unit vectors as ai + bj + ck. The letters i, j, k are the standard symbols for the unit vectors in the x, y and z directions. 

<span>So if A = (3, 4, 5), you can also write A = 3i + 4j + 5k </span>
<span>If B = (1, 1, 1), you can write B = i + j + k </span>
<span>And then A - B is the vector whose components are the differences in each component: A - B = (3 - 1)i + (4 - 1)j + (5 - 1)k = 2i + 3j + 4k </span>

<span>So you need to know what the components of A and B are to answer this.</span>
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