Use Descartes' Rule of Signs to Determine the Possible Number $f ( x ) = 3 x ^ { 6 } - 9 x ^ { 5 } + x ^ { 4 } - 1.5 x ^ { 3 } + 18$

Multiple Choice

Use Descartes' Rule of Signs to determine the possible number of positive and negative real zeros for the polynomial
function.
- $f ( x ) = 3 x ^ { 6 } - 9 x ^ { 5 } + x ^ { 4 } - 1.5 x ^ { 3 } + 18$

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