Find dimensions of rectange with area of 64 sq ft but a minimum perimeter
P'=2 - 128/x^2
y= 8, -8
P''= 256/(-8)^3 is < 0 when x = -8
P is a minimum at x= -8 and y= -8
Are my x and y values right?? And do I use the negative number when finding the minimum perimeter or what?? Did I get the right answers??
HOW DO I GET THE CONCEPT OF OPTIMIZATION??