Roger.Robert
New member
- Joined
- Jan 27, 2018
- Messages
- 30
Prove for every two positive integers a and b that \(\displaystyle (a+b)(\frac{1}{a}+\frac{1}{b}) \geq 4\)
By multiplying I obtained : \(\displaystyle \frac{a^{2}+b^{2}}{ab} \geq 2\)
And this is where I got stuck.
By multiplying I obtained : \(\displaystyle \frac{a^{2}+b^{2}}{ab} \geq 2\)
And this is where I got stuck.