If GCD(a,b)=1\text{GCD}(a, b) = 1GCD(a,b)=1, which of the following is true?
a×b=LCM(a,b)a \times b = \text{LCM}(a, b)a×b=LCM(a,b)
a+b=GCD(a,b)a + b = \text{GCD}(a, b)a+b=GCD(a,b)
aaa and bbb must both be prime
aaa and bbb share no common factors other than 111