a) Prove or disprove: if S,TELluv) then trace ('st) = trove's) tracel T) b) Prove or...
Prove or disprove the following equivalence claim. (r ∧ s ∨ ¬t) ⇒ q ≡ ( ¬r ∧ t) ∨ (¬s ∧ t) ∨ q
44. a.Let A and B be two 2 × 2 matrices,Let Tr denote the trace and det denote the determinant. Prove that Tr(AB)-Tr(BA) and det(AB) - det(BA). b. If A is any matrix in SLa(R), prove that det ((-A-t +1 where t = Tr(A). 44. a.Let A and B be two 2 × 2 matrices,Let Tr denote the trace and det denote the determinant. Prove that Tr(AB)-Tr(BA) and det(AB) - det(BA). b. If A is any matrix in SLa(R), prove...
4. Assume that A, B E Mnxn(R). Prove or disprove each of the following statements. (a) If AB is a product of elementary matrices, then A is a product of elementary matrices. (b) If R is the RREF of A, then det A = det R. (c) If det A-det B, then A = B.
2. Define T : Mmn + Mn.m by T(A) = AT. Prove or disprove that T is a linear transformation. Cite properties/theorems from the textbook or notes as appropriate.
Prove or disprove (8) Let T: V → V be linear. If T is diagonalizable, then T is invertible.
7. Prove or disprove: If we know that 2X +6=4 (mod 8), then X +3 = 2 (mod 8). 8. Prove or disprove: If we know that 2X+6 = 4 (mod 7), then X+3 = 2 (mod 7). 9. Let S be the set {311, 254, -172,45,2019, 111,3}. Find a subset T such that the sum of the elements in divisible by 7
10. Let A, B, and C be sets. (a) Prove or disprove: if A - C CB-C, then ACB. (b) State the converse of part (a) and prove or disprove.
Prove/disprove for any regular expressions R and S: (a) (R + S)∗S = (R∗S)∗ (b) (R + S)∗ = (R∗S)∗ Note: when disproving a statement, you must give a concrete example of R and S, meaning a definition of R and S over some chosen alphabet.
discrete math question using proofs to determine to prove the following equation or disprove it 4. Prove or disprove. Let A, B, C, and D be sets. Then (Ax B)n (CxD) (Ancx (B nD) 5. Prove or disprove: {2k 1 k E Q} {4" | k E Q) F6 7 Prove or disprove. Let A be a set and let I be an arbitrary index set for a collection of sets {Be l α E 1). Then, 6. An(UP)-a αΕΙ
(1) Suppose R and S are reflexive relations on a set A. Prove or disprove each of these statements. (a) RUS is reflexive. (b) Rn S is reflexive. (c) R\S is reflexive. (2) Define the equivalence relation on the set Z where a ~b if and only if a? = 62. (a) List the element(s) of 7. (b) List the element(s) of -1. (c) Describe the set of all equivalence classes.