Question: 5. Which statement is true or false. You need to prove your results. [4] (i) if x(n x 1) is a vector then tr (xx

5. Which statement is true or false. You need to prove your results. [4] (i) if x(n x 1) is a vector then tr (xx ) = 1/x/12 = Ex?. i= 1 [4] (ii) With the same assumption as part (i), the matrix A = xx lx/2 is idem- potent

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