Use Descartes' Rule of Signs to Determine the Possible Number

question 246

Multiple Choice

Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.
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f ( x ) = - 2 x ^ { 4 } + 9 x ^ { 3 } - 7 x ^ { 2 } + 9 x - 7

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Definitions:

Income

The financial return or earnings from employment, investments, or business ventures.

Income Effect

The change in consumption that results from a change in real income, holding prices constant.

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