1003124601

SubArea: 
Rational functions
Level: 
B
Project ID: 
1003124601
Accepted: 
1
Clonable: 
0
Easy: 
0
Let f(x)=2xx2−1. Find the true statement.
∀x∈(−∞;−1)∪(0;1):f(x)<0.
The domain of f is (−∞;1)∪(1;∞).
∀x∈(−1;1):f(x)≤0.
The domain of f is (−∞;−1)∪(−1;0)∪(0;1)∪(1;∞).