(a) Check the set of functions A = {x, 3x²-1, 5x3 3x} for orthogonality on [−1, 1]. - (b) Determine if S is a subspace of R4. If it is, find a basis and the dimension. X1 x2 - S = 2x2 3x40 CR X3 ᏆᎪ

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