Do all the exercises below - hand in only the
numbered exercises.
1. Section 1.6, exercise 6
2. Section 1.6, exercise 21
Section 1.7, exercise 3
3. Section 1.7, exercise 17
4. Section 2.1, exercises 1, 2,
11. Submit solutions to 1(a,e), 2(a,b,e),
11(c)
5. Section 2.1, exercise 10
6. Section 2.1,
exercise 8 (so, except in trivial cases, the union of two
subgroups is never a subgroup)
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