Question

Let A = 2m i^ 6m j^ - 3m k^ and B = 4m i^ 2m j^ - 1m k^ . Then A.B = 1) 8m i^ +12mj^ -3m k^ 2) 12m i^ - 14m j^ -20mk^ 3)23 m² 4)17m² I WILL MARK HIM/HER AS BRAINLIEST!!!!!!!!

Answer 1

Answer:

A = 2m i^ +6m j^ - 3m k^

B = 4m i^+ 2m j^ -1m k^

A.B=(2m i^ +6m j^ - 3m k^).

( 4m i^+ 2m j^-1m k^)

Dot product :Can multiply the same terms.

=2×4+6×2+3×1=8+12+3=23m^2

Option 3.

Answer 2

Answer:

4th is the correct option