ab and ba are two numbers where a and b are co-prime. If the GCD of ab and ba are ( a + b ) /2 , then find the value of ( a + b ) .

(01.03 mc) what does the conversation between marcus and his father reveal about their characters? a marcus doesn't agree with the regulations put in place, but his father does. b marcus's father doesn't agree with the regulations put in place, but marcus does. c marcus's father thinks the regulations provide security, and so does marcus. d marcus wants stricter regulations to be put in place, and his father agrees.