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Find the vectors, not with determinants, but by using properties of cross products
Find the vectors, not with determinants, but by using properties of cross products.
(i + j) × (i - j)
and
k × (i - 2j)
Expert Solution
(a) (i + j) × (i - j)
=ixi -ixj+jxi-jxj
=o -k -k -0=-2k
(b) k × (i - 2j) =kxi-2(kxj) =j-2(-i) =2i+j
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