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Scalar Multiplication of Matrices

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For what value of k does equality hold l 5 2 3 l l 1 2 3 l and l 1 2 4 l l 1 2 4 l
l -10 3 4 l =k l -2 3 4 l ? l 3 6 9 l =k l 3 6 9 l
l-15 4 5 l l -3 4 5 l l 0 5 0 l l5 15 20l

Find the focus of the parabola y2(power)=12x

keywords: matrix

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Scalar multipliers of matrices are found. The solution is detailed and well presented.

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