Difference between revisions of "1966 IMO Problems/Problem 5"

(Created page with "== Problem == Solve the system of equations <math>\begin{align*}|a_1 - a_2| x_2 +|a_1 - a_3| x_3 +|a_1 - a_4| x_4 = 1\\ |a_2 - a_1| x_1 +|a_2 - a_3| x_3 +|a_2 - a_3| x_3 = 1\\ |...")
 
(corrected problem statement)
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Solve the system of equations
 
Solve the system of equations
  
<math>\begin{align*}|a_1 - a_2| x_2 +|a_1 - a_3| x_3 +|a_1 - a_4| x_4 = 1\\ |a_2 - a_1| x_1 +|a_2 - a_3| x_3 +|a_2 - a_3| x_3 = 1\\ |a_3 - a_1| x_1 +|a_3 - a_2| x_2 = 1\\ |a_4 - a_1| x_1 +|a_4 - a_2| x_2 +|a_4 - a_3| x_3 = 1\end{align*}</math>
+
<math>\begin{align*}|a_1 - a_2| x_2 +|a_1 - a_3| x_3 +|a_1 - a_4| x_4 = 1\\ |a_2 - a_1| x_1 +|a_2 - a_3| x_3 +|a_2 - a_4| x_4 = 1\\ |a_3 - a_1| x_1 +|a_3 - a_2| x_2 +|a_3-a_4|x_4= 1\\ |a_4 - a_1| x_1 +|a_4 - a_2| x_2 +|a_4 - a_3| x_3 = 1\end{align*}</math>
  
 
where <math>a_1, a_2, a_3, a_4</math> are four different real numbers.
 
where <math>a_1, a_2, a_3, a_4</math> are four different real numbers.

Revision as of 11:28, 29 March 2012

Problem

Solve the system of equations

$\begin{align*}|a_1 - a_2| x_2 +|a_1 - a_3| x_3 +|a_1 - a_4| x_4 = 1\\ |a_2 - a_1| x_1 +|a_2 - a_3| x_3 +|a_2 - a_4| x_4 = 1\\ |a_3 - a_1| x_1 +|a_3 - a_2| x_2 +|a_3-a_4|x_4= 1\\ |a_4 - a_1| x_1 +|a_4 - a_2| x_2 +|a_4 - a_3| x_3 = 1\end{align*}$ (Error compiling LaTeX. Unknown error_msg)

where $a_1, a_2, a_3, a_4$ are four different real numbers.

Solution

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See also

1966 IMO (Problems) • Resources
Preceded by
Problem 4
1 2 3 4 5 6 Followed by
Problem 6
All IMO Problems and Solutions