Which of the following sets of vectors are subspaces of R3 a
     Which of the following sets of vectors are subspaces of R^3?  [a b 1]  [a b a + 2b]  [a 0 0]  (I) only  (II) only  (III) only  (I) and (III)  (II) and (III)![Which of the following sets of vectors are subspaces of R^3? [a b 1] [a b a + 2b] [a 0 0] (I) only (II) only (III) only (I) and (III) (II) and (III)Solution) 0  Which of the following sets of vectors are subspaces of R^3? [a b 1] [a b a + 2b] [a 0 0] (I) only (II) only (III) only (I) and (III) (II) and (III)Solution) 0](/WebImages/11/which-of-the-following-sets-of-vectors-are-subspaces-of-r3-a-1005902-1761518544-0.webp) 
  
  Solution
) 00 is there
 2) Closed by addition of vectors
 3) Closed by multiplication of real-valued scalar
The answers I have are:
a) No
 b) Yes
 c) Yes
 d) No
![Which of the following sets of vectors are subspaces of R^3? [a b 1] [a b a + 2b] [a 0 0] (I) only (II) only (III) only (I) and (III) (II) and (III)Solution) 0  Which of the following sets of vectors are subspaces of R^3? [a b 1] [a b a + 2b] [a 0 0] (I) only (II) only (III) only (I) and (III) (II) and (III)Solution) 0](/WebImages/11/which-of-the-following-sets-of-vectors-are-subspaces-of-r3-a-1005902-1761518544-0.webp)
