A= {1, a+b, a } B= {0, b/a, b}∵ 0 is not equal to 1case 1if 1= b/a => a= b(a is not equal to 0) ---(1)and case 1.1 if a= 0 contradict (1) (rejected )and case 1.2 if a=b/a => a^2 = b...