Question

A=3i+4k+2j and B=i-j+3k then A*B​

Answer 1

Step-by-step explanation:

(3i^2+4ki+2ji) +(-3ji+4kj+2j^2) + (9ki +12k^2+6kj)=

= 3i^2+4ki+2ji-3ji+4kj+2j^2+9ki+12k^2+6kj

= 3i^2+2j^2+12k^2+13ki-ji+10kj ans

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Answer 2

A dot B ( dot product)

= 3*1 + 4*(-1) + 2*3

= 3 - 4 + 6

= 9 - 4

= 5

[ dot product = i*i + j*j + k*k]