The conditions for affine dependence are stronger than those for linear dependence, so an affinely dependent set is automatically linearly dependent. Also, a linearly independent set cannot be affinely dependent and therefore must be affinely independent. Construct two linearly dependent indexed sets S1 and S2 in ℝ2 such that S1 is affinely dependent and S2 is affinely independent. In each case, the set should contain either one, two, or three nonzero points.
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