document.write( "Question 1209605: The domain of the function q(x) = x^4 + 8x^2 + 7x^3 is (-infty,infty). What is the range? \n" ); document.write( "

Algebra.Com's Answer #849653 by mccravyedwin(408) $\"\"$ $\"About$

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document.write( "The graph of\r\n" );
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document.write( "We need to find the lowest point on the graph.\r\n" );
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document.write( "We use the derivative:\r\n" );
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document.write( "and set it equal to 0:\r\n" );
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document.write( "Solve that by the quadratic formula:\r\n" );
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document.write( "We want the lowest value which is the leftmost minimum point, so we use\r\n" );
document.write( "the - sign\r\n" );
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document.write( "We substitute  in\r\n" );
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document.write( "  and after much work, we get\r\n" );
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document.write( " so the range is\r\n" );
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document.write( "Edwin

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