va rog frumos ex 2 ( a,b,c,d) plsss multumesc
![Va Rog Frumos Ex 2 Abcd Plsss Multumesc class=](https://ro-static.z-dn.net/files/d44/76049795767fd431aa66e4bbb2845ce3.jpg)
A = { 1,2,3,4,5 }
13 < x² - 1 <= 90 => 14 < x² <= 91 => B = { 4,5,6,7,8,9 }
C = { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }
D = { 7, 77, 777, 7777, 77777 }
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