1. The problem statement, all variables and given/known data Find the first partial derivatives of: 1. f(x,y) = x^y 2. u = x^(y/z) 2. Relevant equations 3. The attempt at a solution f_x = y*x^(y-1) f_y = lnx? u_x = (y/z)*x^((y/z)-1) u_y = lnx/z? u_z = ylnx/z? I'm not really sure how to do these right. =/ I would really appreciate any help.