Question

10. If A = 2i – 2j and B = 2k, then A.B = ___​

Answer 1

Answer:

Ans:A.B= 4k(i-j)

Explanation:

> if A= (2i-2j) and B=2k

Then, > A.B

or, A×B= (2i-2j) ×2k

or,AB=(4ik-4jk)

or,A.B= 4k(i-j) (ans).