Calculus IV Quiz 1 Fall 1998 9/9/98
1. State the definition of the partial derivative of a function f(x,y)
with respect to y.
2. Write an equation for the plane tangent to the surface z = y3
- 2xy at the point (1, -2).
3. Let f(x,y) = 
.
Find the gradient of f at the point (1, -1).
