1003034310

SubArea: 
Logic and sets
Level: 
B
Project ID: 
1003034310
Accepted: 
1
Clonable: 
0
Easy: 
0
Find the union \( A'\cup B \) for \( A=(-1;7) \) and \( B=[-3;+\infty) \).
\( \mathbb{R} \)
\( [ -3;+\infty) \)
\( [-3;-1]\cup[7;+\infty) \)
\( (-3;-1)\cup(7;+\infty) \)