Which of these is equivalent to LCM(a,b)⋅GCD(a,b)\text{LCM}(a, b) \cdot \text{GCD}(a, b)LCM(a,b)⋅GCD(a,b)?
a+ba+ba+b
a⋅ba \cdot ba⋅b
a⋅b2a \cdot b^2a⋅b2
ab\frac{a}{b}ba