In the Group G=(2,4,6,8) under multiplication modulo 10, the identity element is?
- 4
- 8
- 6
- None of these
Explanation
The identity element e should satisfy ae = ea = a for all a in G.
Here, e = 6 works since 26=2, 46=4, 66=6, 86=8.
Related MCQs
- 2x² + 4 = 9x
- 2x² + 9 = 4x
- 2x² + 9 = 4x
- x² + 4 = 9x
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