Math, asked by findpbhpadam, 6 hours ago

In acommutative ring without unity

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Answered by angshu12
0

Answer:

1 Z is a commutative ring with unity. 2 E = {2k | k ∈ Z} is a commutative ring without unity. 3 Mn(R) is a non-commutative ring with unity. 4 Mn(E) is a non-commutative ring without unity.

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