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5) Leth-{ơes,lo(4) 4) That is, H is the set of permutation in S4 that leave the element 4 in its place. (i) Prove that H is a subgroup of S4. (ii) Prove that S is isomorphic to H. Explicitly give an...
1- (2,5+2,5 mark) Consider in GL(2, Q), the subset (a=1 or a=-1),bez Prove that H, with multiplication, is a subgroup of GL(2,Q) a) Is the function b) an homomorphism of groups? Justify your answer 2 (3 marks) Let G be a group and a E G an element of order 12. Find the orders of each of the elements of (a) 3- (1+1,5 marks) Let G be a group such that any non-identity element has order 2. Prove that a)...