Question

Prove m(A.B)=(mA).B=A.(mB)=(A.B)m where m is scalar and A & B are vectors

Answer 1

Step-by-step explanation:

a.b=a.c

a.b−a.c=0

a.(b−c)=0

∣a∣.∣b−c∣cosθ=0

⇒∣a∣



=0 also cosθ



=0

⇒a.b=a.c



=0

⇒∣b−c∣=0

∴b=c