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+0  
 
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avatar+581 

x+cuberoot(x) = 30

 

What is the value of x?

Please tell me the process.

 Sep 8, 2019
 #1
avatar+103858 
+1

x + ∛x   = 30

 

Note that, if we desire integer solutions, x cannot  be negative and it cannot, obviously, be larger than 30

 

The cubes between  0  and 30   are   1, 8, 27

 

Note that if x  = 27.......

 

27 + ∛27  =

 

27 + 3  =   

 

30

 

So....x  = 27

 

 

 

 

cool cool cool

 Sep 8, 2019

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