INMO 1993 Problem 3

If $a,b,c,d \in \mathbb{R}_{+}$ and $a+b +c +d =1$ , show that $ab +bc +cd \leq \dfrac{1}{4}.$

Dataset text AI-MO AoPS. Quoted with source.

Solutions

No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.