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Let m⋆n=m/n+n/m for all integers m, n≠0 If m^2+n^2=8 and mn=4, what is the value of m⋆n? 

 Jan 4, 2021
edited by JoLink  Jan 4, 2021
 #1
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+1

m/n + n/m    =  

 

[ m^2  + n^2 ]   /   mn

 

Now  just fill in what we  know

 

[ 8 ]  /  [ 4  ]  =   2  =  m + n

 

 

cool cool cool

 Jan 4, 2021

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