SubArea: Quadratic equations and inequalitiesLevel: BProject ID: 2000000702Accepted: 0Clonable: 0Easy: 1Use the given graph of the function f:y=−x2−1 to solve the inequality −x2−1≤0.x∈Rx∈∅x∈(−1;1)x∈(−∞;−1)∪(1;∞)
