Question

If vectors 3i+j-k and bi-4j+4k are parallel, find the value of b.

Answer 1

Answer:b=-12

Explanation:

Since 3i+j-k and bi-4j+4k are parallel vectors, one of them must be a multiple of the other.

Here, the common multiple is -4 as bi+ (1*-4) j + (-1*-4)k = bi-4j+4k

Similarly, b=(3*-4)= -12

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