Question

A = 2î + 3ſ + k

B = î + 29 - 2​

Answer 1

Answer:

A.B=6,A×B=-8i+5j

Explanation:

A.B vector=(2i+3j+k)(i+2j+-2k)

multiply them by open the brackets.

2(1)+0+0+0+6(1)+0+0+0-2(1)

2+6-2

=6

A×Bvector=

i[(3×-2)-(1×2)]+j[(1×1)-(2×-2)]+k(2×2-1×3)

i(-6-2)+j(1+4)+k(4-4)

-8i+5j+0k

-8i+5j