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10. Which of the following is a one-dimensional subspace of R3? A) {(2, y, z)?|x2 – y + 2z=0}. B) {(x,y, 2)7|x + 24 +32 =0}. C) The solution set of Av = 0 where A= 1 -2 3 -1 4 0 0 2 3 D) {(x, y, z)?|x + 2y + 32 = 4}. E) The solution set of Av = 0 where A= 1 0 2 0 2 0 11 0 5
(3 1 7. The rank of 1 2 11 1 3 2 1 1 2 -1 0 is 1 0 -1 " 2 ). (A) 1 (B) 2 (C) 3 (1) 4)
21 2:11 + + 7. When does the system 2ac2 = 612 + ax3 = -8.02 + 4ax3 = 0 0 have a nontrivial solution? 0 A) When a = 0 or a = 2. B) For any real number a. C) When a=0. D) When a = 0 or a = -2.
