微积分Find two positive numbersFind two positive numbers whose produ_数学解答

微积分Find two positive numbers
Find two positive numbers whose product is 36 and whose sum is a minimum.

人气：300 ℃　时间：2020-06-16 11:35:24

解答

题意为：找出满足以下条件的两个正实数：积为36,和最小.
x>0,y>0,xy=36,
f(x)=x+y=x+36/x
x=6时,f(x)有最小值36,y=36/6=6