Which of the following sets are subspaces of R³? A. {(x, y, z) |2x - 8y + 3z = 9}| □ B. {(−5, y, z) | y, z arbitrary numbers }| □ C. {(-9x, —2x, 8x) 1 x arbitrary number}| □ D. {(x, 0, 0) 1 x arbitrary number}| □ E. {(x, y, z) | - 5x + 4y +7z = 0}| □ F. {(x, y, z) | x

O -2x (3) A. 7x XER 5x -{]-*-*-*-²} B. y - 7x - 5y - 4z Which of the following sets are subspaces of R³ ? C. ● Z F. X x + 3 x - 8 ● X •{:) -->0} D. y Z | XER} X = { ;] x + y + ² = 0 } E. X Z X {] Z - 3x + 8y = 0 & 6x2z =

Determine whether each subset is a subspace of R2.a. The set of points on the line x + 2y = 0b. The set of points on the line x + 2y = 1

If A, B Mn(R) are invertible, then the columns of A span the row space of B