document.write( "Question 394916: i really need help with this one. f(x)=2x^-12x-4
\n" ); document.write( "a)determine without graphing whether the function has a minimum or maximum value
\n" ); document.write( "b)find minimum or maximum value and determine where it occurs
\n" ); document.write( "c)identify the functions domain and range \n" ); document.write( "

Algebra.Com's Answer #280269 by robertb(5830) $\"\"$ $\"About$

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I will assume the function to be $\"f%28x%29+=+2x%5E2-12x-4\"$ .\r
\n" ); document.write( "\n" ); document.write( "The domain is R, the set of all real numbers. The graph is a parabola opening upward (a = 2 > 0) , and so the function has a minimum (corresponding to the vertex.)\r
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.\r
\n" ); document.write( "\n" ); document.write( "The vertex is thus the point (3, -22). So the minimum occurs at x = 3, and the minimum value is -22.
\n" ); document.write( " The range of the function is [-22, $\"infinity\"$ ). \n" ); document.write( "

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