posted by :) .
Find two positive numbers whose product is 100 and whose sum is a minimum.
but a= 100/b
S=100/b + b
solve for b, then go back and solve for a.
i hope i got it right. The two numbers are 10 and 10?
Exactly right. It's just the same as finding a rectangle of maximum area for a given perimeter. It's always a square.