Problem C. 1268. (January 2015)
C. 1268. Prove that for all real numbers \(\displaystyle a\) and \(\displaystyle b\), \(\displaystyle a^4+b^4+2\ge 4ab\).
(5 pont)
Deadline expired on February 10, 2015.
Statistics:
159 students sent a solution. 5 points: 94 students. 4 points: 31 students. 3 points: 13 students. 2 points: 11 students. 1 point: 3 students. 0 point: 2 students. Unfair, not evaluated: 5 solutionss.
Problems in Mathematics of KöMaL, January 2015