Use Descartes' Rule of Signs to Determine the Possible Number $f ( x ) = - 5 x ^ { 7 } + x ^ { 3 } - x ^ { 2 } + 4$

question 135

Multiple Choice

Use Descartes' Rule of Signs to determine the possible number of positive and negative real zeros for the polynomial
function.
- $f ( x ) = - 5 x ^ { 7 } + x ^ { 3 } - x ^ { 2 } + 4$

• A)2 or 0 positive zeros, 3 or 1 negative zeros
• B)3 or 1 positive zeros, 2 or 0 negative zeros
• C)2 or 0 positive zeros, 2 or 0 negative zeros
• D)3 or 1 positive zeros, 3 or 1 negative zeros

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