- #1

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**for which of the following rings is it possible for the product of two nonzero elements to be 0?**

**1. ring of complex numbers**

2. ring of integers modulo 11

3. the ring of continuous real-valued functions on [0,1]

4. the ring {a+b(sqrt(2)) : a & b are rational numbers}

5. ring of polynomials in x with real coefficients

2. ring of integers modulo 11

3. the ring of continuous real-valued functions on [0,1]

4. the ring {a+b(sqrt(2)) : a & b are rational numbers}

5. ring of polynomials in x with real coefficients