Is the differentiation correct in pytorch tutorial?
I'm going through https://pytorch.org/tutorials/beginner/blitz/autograd_tutorial.html#sphx-glr-beginner-blitz-autograd-tutorial-py and noticed an equation I couldn't understand. For the below equation for the tutorial,

Isn't do/dx = 6 (xi+2). How is it 3/2(xi+2)?

There is a 1/4 term in front of the summation. So you get 6/4(xi + 2) = 3/2(xi + 2).
