document.write( "Question 861172: Is there a quadratic function that has a domain and range of (−∞, ∞)? Why or why not? \n" ); document.write( "
Algebra.Com's Answer #519141 by richard1234(7193)\"\" \"About 
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No. If the domain is , then on the xy-plane, the quadratic either has an absolute maximum or an absolute minimum. \n" ); document.write( "
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