Use Descartes's Rule of Signs to Determine the Possible Number $$f ( x ) = - 10 x ^ { 7 } - 3 x ^ { 6 } - 1.5 x ^ { 5 } + 9 x ^ { 4 } + x + 6$$

question 445

Multiple Choice

Use Descartes's Rule of Signs to determine the possible number of positive and negative real zeros for the given
function.
- $$f ( x ) = - 10 x ^ { 7 } - 3 x ^ { 6 } - 1.5 x ^ { 5 } + 9 x ^ { 4 } + x + 6$$

• A) 1 positive zero, 4,3 or 1 negative zeros
• B) 1 positive zero, 2 or 0 negative zeros
• C) 1 positive zero, 4 or 2 negative zeros
• D) 1 positive zero, 3 or 1 negative zeros

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