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 \( B=[-3,+\infty) \).
\( \mathbb{R} \)
\( [ -3,+\infty) \)
\( [-3,-1]\cup[7,+\infty) \)
\( (-3,-1)\cup(7,+\infty) \)