(Wt,αt) represents the parameters already estimated in the previous iteration while (Wt+1,αt+1) is updated via a standard gradient descent algorithm from (Wt,αt). For the first iteration (t = 0), we use
Is there an algorithm to determine if a closed form solution exists? Consider the solution presented below and explain in detail how the 4th line was obtained from the 3rd line (highlighted in blue). In particular, how were the x^2 and -8x term...