+0  
 
0
600
1
avatar+231 

thanks again!!!(last one)

 May 13, 2020
 #1
avatar+37146 
0

2u       u  cannot equal or be less than - 1/2   because    2(-1/2) = -1

-20 u   u cannot equal or be MORE  than   1/20  because  -20 ( 1/10) = -1

 

 

(-1/2, 1 /20)     edited

 May 13, 2020
edited by ElectricPavlov  May 14, 2020

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