Use Descartes's Rule of Signs to Determine the Possible Number $$f ( x ) = 9 x ^ { 3 } - 7 x ^ { 2 } + x + 4.5$$

question 89

Multiple Choice

Use Descartes's Rule of Signs to determine the possible number of positive and negative real zeros for the given
function.
- $$f ( x ) = 9 x ^ { 3 } - 7 x ^ { 2 } + x + 4.5$$

• A) 2 or 0 positive zeros, 1 negative zero
• B) 3 or 1 positive zeros, 1 negative zero
• C) 2 or 0 positive zeros, no negative zeros
• D) 3 or 1 positive zeros, 2 or 0 negative zeros

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