Use Descartes's Rule of Signs to Determine the Possible Numbers

question 15

Multiple Choice

Use Descartes's Rule of Signs to determine the possible numbers of positive and negative zeros of the function. ​
4x⁵ - 8x
​

• A)One negative zero
• B)One negative zero or three positive zeros
• C)Two negative zeros or no positive zero
• D)One positive zero,one negative zero
• E)One negative zero,four negative zeros

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Definitions:

Nasal Conchae

Curved bony projections in the nasal cavity that help to humidify, warm, and filter air as it is inhaled.

Paranasal Sinuses

Air-filled spaces within the bones of the skull and face, connected to the nasal cavity and involved in the production of mucus and voice resonance.

Paranasal Sinuses

Air-filled spaces in the bones of the skull that are connected to the nasal cavity.

Nasopharynx

The nasopharynx is the upper part of the pharynx, connecting the nasal cavity above to the mouth and larynx below.