+0  
 
+1
25
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Find all real numbers \(x\) such that \( x^2 + \left\lfloor \frac x2 \right\rfloor + \left\lfloor \frac x3 \right\rfloor = 10. \)

 
 Jan 11, 2019
 #1
avatar+94296 
+1

Not sure how to solve this algebraically, but WolframAlpha gives a solution of  -√14

 

Check

 

( -√14 )^2 +  floor  (-√14 / 2)  + floor (-√14 / 3 )  =

 

14   +  floor (≈ -1.87) + floor ( ≈ -1.247)  = 

 

14    -  2      -  2       =  

 

10

 

 

cool cool cool

 
 Jan 11, 2019

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