Question

If vector A=2i+3j-k find vector x parallel to A but has magnitude of B

Answer 1

Answer:

BRAINLEST!!

Vector A and B are perpendicular , so the dot product of A and B is zero,i.e A.B=0

A = 2i + aj + k and B = 4i -2j - k

Now A.B = (2i+aj+k).(4i-2j-k)=0

Or, 2×4 - a×2 -1 =0

Or, 2a = 8–1

Or, a = 7/2

The value of a is 7/2