Question

P vector and Q vector are the two perpendicular vectors If P = 5i^+7j^-3k^& Q=2i^+2j^-ak^ then the value of a is

Answer 1

P vector and Q vector are the two perpendicular vectors If P = 5i^+7j^-3k^& Q=2i^+2j^-ak^ then the value of a is 9 so that the dot product of each coefficients of I,j,k vectors are 0