Thread:Double Slap/@comment-3017217-20150501142244/@comment-3017217-20150517091627

Calculations?

Multiplication is much simpler than Addition in Algebra.

(xy) ^ 2  is just x ^ 2 * y ^ 2

xy / y is x

The inverse is true for the 2 Calculus Operations Differentiating and Integrating

But for the purposes of optimization we are allowed to take the logarithm of the function and optimize it instead and since the logarithm is a monotonic modification and the optimal point of the function and its logarithm coincide you have your addition.

Multiplication is generally favourable!!!