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14111cn2.13 - c Kendra Kilmer Definition The identity...

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c Kendra Kilmer August 18, 2011 Definition: The identity matrix of size n has n rows and n columns. It has 1’s along the main diagonal and 0’s everywhere else. A matrix multiplied by the appropriate identity matrix results in the orignal matrix. Example 3: Mulitply the matrix below by the appropriate identiy matrix. 1 2 4 1 3 2 Example 4: The Yummy Cake Company makes three types of cakes: Angel Food, Italian Cream, and Choco- late. The company produces its cakes in College Station, Santa Cruz, and Austin using two main ingredients, sugar and flour. a) Each kilogram of Angel Food requires 0 . 1 kg of sugar and 0 . 5 kg of flour. Each kilogram of Italian Cream requires 0 . 6 kg of sugar and 0
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