#Calc 3
14 messages · Page 1 of 1 (latest)
try to find the critical point of the curve, i.e. centre of conic
and check it for domain if it is applicable
then that critical point with give you either max or min
if its negative, its minima, since at origin, f = 0
if its positive, it should be maxima
next assume x,y as points on the given circle
as parametric point, and then put them in th curve, then find the critical points of it
exercise: try finding that without using calculus
hint: ||
- observe the symmetry between x and y in the feasible region. use an appropriate substitution to transform the objective function, such that it also demonstrate such symmetry
- use some elementary inequalities (often seen in #competition-math) to get the absolute maximum||
hint for part 1:
||1. find the eigenvectors of the matrix of the bilinear form. you'll realize that those eigenvectors form an orthonormal basis for the plane
- write this bilinear form with respect to this orthonormal basis of eigenvectors
- complete the square||