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Consider the following quadratic form: Q(x1, x2, x3) = x + 2x + 4x3 (a) Write this quadratic form in the matrix form. (b)

Consider the following quadratic form: Q(x1, x2, x3) = x + 2x + 4x3 (a) Write this quadratic form in the matrix form. (b) Find the definiteness of this quadratic form. (c) Use MATLAB to prove your results (determinants) in (b).

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