Third Method of Solving IMO Optimization Contest Problem:
Find the minimum value of $xy$, given that $x^2+y^2+z^2=7$, $xy+xz+yz=4$, and $x, y$ and $z$ are real numbers.
This third method is provided by Mark, another blog contributor and he approached the problem using the well-known Lagrange multipliers method:
Showing posts with label Lagrange multipliers method. Show all posts
Showing posts with label Lagrange multipliers method. Show all posts
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