Dimension in problem 4 of problem set 1

[lorenzorossi7]

In the text of problem 4 of problem set 1 (Convexity of Generalized Linear Models), it says that x and theta are in R^n, but they should be in R^(n+1) with the convention x_0=1 (at least if we use the notation of the lectures on Generalized Linear Models)