Use Descartes' Rule of Signs to determine the possible number of positive and negative zeros of 
.
A. 3 positive reals or 1 positive real; 3 negative reals or 1 negative real
B. 3 positive reals or 1 positive real; no negative reals
C. 1 positive real; 3 negative reals or 1 negative real
D. 3 positive reals or 1 positive real; 1 negative real
E. no positive reals; no negative reals
Answer: B
Mathematics
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