Question

If A - î+j+k and B = 2i+j find A. B
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Answer 1

Answer:

Given Data:

A= i+j+k

B=2i+j

Solution:

A.B= ( 1i+1j+1k)  .(2i+1j+ok)

     =2i +1j+0k

     =2+1

A.B=3