. Question 17 0.5/1 pt 9 3 96 0 Details Let f(a) = 3x3 + 23x - 16. Use Descartes' Rule of Signs to answer the following questions. (a) List the possible number of positive real zeros (counting multiplicities) of f (a): (b) List the possible number of negative real zeros (counting multiplicities) of f (a): (c) May anything definitive be said about the exact number of positive real zeros? Select an answer (d) May anything definitive be said about the exact number of negative real zeros? Select an answer Question Help: Message instructor Add Work Calculator