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Instructions. Five problems on two pages, ten points each. Throughout, let R be a commutative ring with 1 Definition: For a,
3. Prove that if a is an unit then for any ceR,a| c. 4. Prove that if a is an unit then ab 0 if and only if b = 0. 5. Prove t
Please do all. Thanks.
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3 s unt So Let a = a a. Cs cnned with CamScanner

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Please do all. Thanks. Instructions. Five problems on two pages, ten points each. Throughout, let R...
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