SOLUTION: Is there a quadratic function that has a domain and range of (−∞, ∞)? Why or why not?

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Question 861172: Is there a quadratic function that has a domain and range of (−∞, ∞)? Why or why not?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
No. If the domain is , then on the xy-plane, the quadratic either has an absolute maximum or an absolute minimum.