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Linear algebra and geometry

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Let be the vectors given in MATLAB by

u = [1057,1218,91];

v = [-151,-174,-13];

w = [-6,-5,16];

Which of the following statements is correct?

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Let e be vectors given in MATLAB by

v = [2077/974; 1030/423; -1029/4189];

w = [6129/312; -7193/9987; 2357/6478];

and let be the orthogonal projection of along the direction of . Which of the following statements is correct?

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Let the following vectors be given in MATLAB:

v1 = [5, -2, 3, 6, 7, -1, 8, 4];

v2 = [1, 4, -3, 9, 2, 0, 7, -5];

v3 = [2/3, 1/4, 5/2, 7/8, 3, 9/5, 1/7, 6/5];

v4 = [3, -1, 8, 5, 0, -2, 6, 9];

v5 = [4, 7, -5, 2, 1, 8, -3, 0];

Let be the matrix having these vectors as columns. How many solutions does the homogeneous system admit? 

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Copy here the script/instructions used to solve the second exercise:

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Copy here the script/instructions used to solve the third exercise:

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