The absolute extrema of a function on a closed region are either local extrema (where the gradient is zero), or on the boundary of the region. Check for local extrema in the region, and check the values on the boundary.
The absolute extrema of a function on a closed region are either local extrema (where the gradient is zero), or on the boundary of the region. Check for local extrema in the region, and check the values on the boundary.
--Kevin C.
The thing is... I can't find the critical points.. I found the partial derivatives and set them equal to zero.. now what? can anyone solve this for me?? thanks