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avatar+35 

Can someone explain x

Or just the nature of 2

 Mar 4, 2020
 #1
avatar+21725 
+2

Its just a subscript to denote a difference in terms.....   like   x1   is different than the second x   or   x2 ,   it doesn't imply any mathematical calculation like   x2   does   (x squared.....or   x * x )

 Mar 4, 2020

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