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Question: these problems involve matrices determinants and the cross product i...

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These problems involve matrices, determinants and the cross product. I attempted these and got them wrong. Any correct help will be appreciated. Thanks.
y Nates Ask Your Compute a b, where a-- kb-2ik
13.011. Describe all unit vectors erthogonal to both of the given vectors. pesitive i-component 20s +41 +38 negative i-component
9. -1 points MarsvectorCalo 1.2 My Notes find an equation for the plane that cotains the line w . (-1,1,2)+f(6·7,习and is perpendicular to the plane 5x + 6r-z+9.0
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