Mathematical and Physical Journal
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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.


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 solutions.

Problems in Mathematics of KöMaL, January 2015