Problem C. 1301. (September 2015)
C. 1301. Prove that if \(\displaystyle x_1\) and \(\displaystyle x_2\) are positive real numbers, then
\(\displaystyle (x_1+x_2+1) \left(\frac{1}{x_1}+\frac{1}{x_2}+1\right)\ge 9. \)
(5 pont)
Deadline expired on October 12, 2015.
Statistics:
197 students sent a solution. 5 points: 168 students. 4 points: 11 students. 3 points: 6 students. 2 points: 2 students. 1 point: 5 students. 0 point: 5 students.
Problems in Mathematics of KöMaL, September 2015