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Find the unit vector in the same direction as x = (1, 2, 3). Find all unit vectors in R that are orthogonal to

$Find the unit vector in the same direction as ( x=(1,2,3) ). Find all unit vectors in ( mathbb{R}^{2} ) that are orthogo$ $Let ( A=operatorname{diag}(1,2,3,4,5,6,7,8) ). (a) What is ( |A| ) ? (b) What is ( A^{-1} ) ?$

Find the unit vector in the same direction as x = (1, 2, 3). Find all unit vectors in R that are orthogonal to (1,1). How would you describe the set of all points x Rd with x x = 25? Let A = diag(1, 2, 3, 4, 5, 6, 7, 8). (a) What is |A|? (b) What is A-?

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