The scalar product of two vectors A=2i^+2j^-k^ and B=-j^+k^, is given by

Given, A=2i^+2j^-k^ and B=-j^+k^Scalar product, A·B=(2i^+2j^-k^)·(-j^+k^)Using  i^·i^=1,j^·j^=1,k^·k^=1We have, A·B=-2-1=-3