4. H ere are some True/False questions. If your answer is "TRUE", there is no need to justify you...
Determine whether the following statements are True or False. Justify your answer with a proof or a counterexample as appropriate. (a) The relation Son R given by Sy if and only if 1 - YER - N is an equivalence relation. (b) The groups (R,+) and (0,0), :) are isomorphic.
12. NEZ True] [False] A maximal ideal is prime. [True] [False] The ring Q[x]/<r? + 10x + 5) is a field [True] [False] If R is an integral domain and I c R is an ideal, then R/I is an integral domain as well [True] [False] The map : M2(Q) - Q defined by °(A) = det(A) is a ring homomorphism. [True] [False] If I, J are distinct ideals of a ring R then the quotient rings R/T and R/T...
Mark each statement as True or False and justify your answer. a) The columns of a matrix A are linearly independent, if the equation Ax = 0 has the trivial solution. b) If vi, i = 1, ...,5, are in RS and V3 = 0, then {V1, V2, V3, V4, Vs} is linearly dependent. c) If vi, i = 1, 2, 3, are in R3, and if v3 is not a linear combination of vi and v2, then {V1, V2,...
(a) (b) True or False: If K is a field and u, v are algebraic elements of degrees m, n respectively in some extension field of K, then (K(u,v Explain. If you are not sure, explain what you are not sure about. Let E be an extension field of K, and let S (u_1,..u_n) be a set of elements of E. Explain what it means for S to be a *basis* for E as a vector space over K. *...
TRUE/FALSE (5 points) Answer each of the following as True or False. You don't have to justify your answer. (a) The quotient group Z12/(8) is isomorphic to Za (b) Any subgroup H of G of index 2 is normal in G. (c) For every n 2 2, the quotient group Sn/An is isomorphic to Z2. (d) If H is a normal subgroup of G, then Ha-1H for every a E H (e) The symmetric group S3 has exactly three normal...
7. (16 marks) True-false questions: in each case decide if the statement is true or false; if true, present a short argument supporting it, and if it is false present a counterexample. a) The product of a rational and an irrational number is always irrational. b) If x and y are non-constructible then so is x + y. c) If x is constructible then so is 1. d) The set of non-constructibles is a subfield of R. e) The set...
5. Determine whether the following statements are True or False. Justify your answer with a proof or a counterexample as appropriate. (a) The relation S on R given by xSy if and only if X – Y E R – N is an equivalence relation.
I need some help with these true false questions for linear algebra: a. If Ais a 4 x 3 matrix with rank 3, then the equation Ax = 0 has a unique solution. T or F? b. If a linear map f: R^n goes to R^n has nullity 0, then it is onto. T or F? c. If V = span{v1, v2, v3,} is a 3-dimensional vector space, then {v1, v2, v3} is a basis for V. T or F?...
Part A. (True/False Questions) (15 pts). Decide if the given statement is true or false. (Justify briefly your answer) 1. The eigenvalues of the matrix A = -5 6 are: 5 and -4. O True False 2. Let A= 2 -4 be a square matrix. The vector v= [ is an eigenvector of the matrix A. 2 True False 3. If I = -4 is an eigenvalue of a 5 x 5 matrix A, then Av = -4v for any...
Please only answer questions a, d, and f. Thank you. 1. True/False Explain. If true, provide a brief explanation and if false, provide a counterexample. Choose 3 to answer, if more than 3 are completed I will pick the most convenient 3. Given a sequence {an} with linn→alanF1, it follows that linnn→aA,-1. b. A series whose terms converge to 0 always converges. c. A sequence an converges if for some M< oo, an 2 M and an+1 >an for all...