19. (5%) If Y is uniformly distributed over [0, 5], what is the probability that the roots of the equation 4x2 + 4xY +Y +2= 0 are both real? (A) 1/5 (B) 2/5 (C) 1/2 (D) 3/5 (E) 4/5

4. (5%) Let A be an m by n matrix. Which statement is TRUE? (A) The null space of A is a subspace of the column space of AT (B) The dimension of the null space of A plus the dimension of the row space of A is (C) The null space of AT equals column space of A (D) The column space of A is orthogonal to the row space of AT (E) The direct sum of the row space of A and the null space of AT is Rm

19. (5%) If Y is uniformly distributed over [0, 5], what is the probability that the roots of the equation 4x² + 4xY +Y +2= 0 are both real?
(A) 1/5
(B) 2/5
(C) 1/2
(D) 3/5
(E) 4/5

相關試題

相關試卷