Question

In: Advanced Math

Which of the following sets are rings with respect to the usual operations of addition and...

Which of the following sets are rings with respect to the usual operations of addition and multiplication? If the set is a ring, is it also a field? can you explain in detail, I really do not understand how to prove.

  1. Q(√2,√3)={a+b√2+c√3+d√6:a,b,c,d∈Q}

  2. R={a+b3√3:a,b∈Q}

Solutions

Expert Solution

Since for (b) R={a+b3√3:a,b€Q } is not a ring so not field

For (a) Q(√2,√3) I have proved that it is field

Since their are various ways to proof it is field.

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