Quiz 3 Calc IV (Math2443-002) 6/12/2002

 


Each problem is worth 5 points. For full credit indicate clearly how you reached your answer.

1. Find an equation for the plane tangent to f(x,y) = x2y - y2x + 7x at the point (-3,1).
 
 

2. If f(x,y) = ln(x2+y2), find grad f(x,y).