Use Descartes Rule of signs to determine the number of positive and negative

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Mathematics
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11th Grade - University
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in using Descartes' Rule of Signs to find the number of positive real zeros?
Calculate the derivative of the polynomial.
Bring down the signs of each term in the polynomial.
Identify the degree of the polynomial.
Count the number of terms in the polynomial.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you determine the possible number of positive real zeros after counting the sign changes?
Add an even number to the number of sign changes.
Subtract an even number from the number of sign changes.
Multiply the number of sign changes by 2.
Divide the number of sign changes by 2.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When applying Descartes' Rule of Signs to find negative real zeros, what substitution is made in the polynomial?
Replace x with 1/x.
Replace x with -x.
Replace x with x^2.
Replace x with 0.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What indicates the absence of negative real zeros in a polynomial?
The polynomial is a constant.
All terms have positive coefficients.
There are no sign changes after substituting -x.
The polynomial has an even degree.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main conclusion about the polynomial zeros in the final section?
There are negative real zeros but no positive real zeros.
There are both positive and negative real zeros.
There are no real zeros at all.
There are positive real zeros but no negative real zeros.
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