f and g are functions of x and y. f(1,2)= 2 and g(1,2)= 1.

Last updated: 7/29/2022

f and g are functions of x and y. f(1,2)= 2 and g(1,2)= 1. Also at (1,2) df = -2dx + 5dy dg = 4dx - 3dy z is a function of (x,y) defined implicitly by z2f+zg+x-y=0 with z(1, 2) = -1. Then dz dx(1, 2) = a) 1/2 b) -1/2 c) 5/3 d) -5/3 e) -2