Question

Find the value of p for which the vector 3i+2j+9k and i-2pj+3k are parallel​

Answer 1

Answer:

Step-by-step explanation:

Two vector a and b  are parallel if and only if a =k b , where k is a constant ( a scalar).

We can see that for the given vectors we have the relation a = 3 b , in fact :

a = 3 i + 6 j + 9 k = 3(i+2 j+3 k ) = 3 b

Therefore the vectors a and b are parallel , the corresponding directed line segments of these vectors have a common direction.