Determine the value of P so that vector N = 2i + pj + k and vector M = 4i - 2j - 2k are perpendicular

Answer 1

Hi Friday, for the vectors to be perpendicular, their do product must be zero.

M . N = 2 * 4 + p * -2 + 1 * - 2 = 0

8 - 2p -2 = 0

6 - 2p = 0

Solve for p:

-2p = -6

p = 3

Questions?