Assignment 9
Pages 2

L are 1%, 2% and 3% respectively, determine the error in η. (8)

9. Determine and distinugish between the stationary values of the function

f (x, y) = x3 − 6x2 − 8y2 and sketch an approximate contour map to represent the surface f (x, y). (20)

10. An open, rectangular fish tank is to have a volume of 13.5 m3. Determine the least surface area of glass required. (12)