For a function of two variables z=f(x,y), the gradient is the two-dimensional vector <f_x(x,y),f_y(x,y)>. This definition generalizes in a natural way to functions of more than three variables. For the function z=f(x,y)=4x^2+y^2.
By this definition, about 10% of people who smoke marijuana become addicted to it. (More on Time.com: PHOTOS â Cannabis Conventions). However, nonspecialists (including many doctors) still tend to use an older perspective, now seen as outdated by experts.
the usual current strength of LSD street samples: 20-80 ug most accurately describes the addiction profile for psychedelics such as psilocybin mushrooms, LSD and peyoteL they do not generally produce compulsive drug-seeking behavior and not considered addictive. people who smoke marijuana commonly present with: chronic bronchitis.