.What is the minimum value of the sum of a positive real number and its reciprocal?RT

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.What is the minimum value of the sum of a positive real number and its reciprocal?RT

.What is the minimum value of the sum of a positive real number and its reciprocal?RT
.What is the minimum value of the sum of a positive real number and its reciprocal?
RT

.What is the minimum value of the sum of a positive real number and its reciprocal?RT
正实数和它倒数的和的最少值是多少?
设这个正实数为a
那么他的倒数就是1/a
那么a+1/a>=2倍根号(a×1/a)=2
当a=1/a,也就是a=1的时候
取等号
所以正实数和他的倒数的和的最小值是2

最小的正整数数和它的的倒数
都是1

什么是最小值总和的一个积极的实数及其相互吗?

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