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أسئلة شائعة


 

Name:                                                  Math 344, Quize#1.

 

 

 

 Q1: Let R be a ring without zero divisor and with identity. Then prove that:-

       

          If  aЄR, a²=1  then either a= 1R  or a= -1R

 

 

 

Q2: If R be a ring with identity and S is a subring of R with identity such that  1S ≠ 1R    

then prove that 1S  is a zero divisor in R.

 

 

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