In Exercises 11 and 12, mark each statement
Chapter 8, Problem 12E(choose chapter or problem)
Problem 12EIn Exercises 11 and 12, mark each statement True or False. Justify each answer.
a. If S = {x}, then aff S is the empty set.
b. A set is affine if and only if it contains its affine hull.
c. A flat of dimension 1 is called a line.
d. A flat of dimension 2 is called a hyperplane.
e. A flat through the origin is a subspace.
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