Exercise 16, § 8 Algebra, I, 174 Give examples of ideals a,b,ca, b, ca,b,c in the ring Z\mathbf{Z}Z such that ab≠a∩bab \neq a \cap bab=a∩b and (a+b)(a+c)≠a+bc(a + b)(a + c) \neq a + bc(a+b)(a+c)=a+bc. Solution No solution has been written yet.