Use Descartes's Rule of Signs to Determine the Possible Number $$f ( x ) = - 7 x ^ { 9 } + x ^ { 7 } - x ^ { 2 } + 3$$

question 93

Multiple Choice

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

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

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