Question

What are the possible numbers of positive real, negative real, and complex zeros of
f(x) = -7x4 - 12x3 + 9x2 - 17x + 3?

Positive Real: 3 or 1
Negative Real: 1
Complex: 2 or 0

Positive Real: 3 or 1
Negative Real: 2 or 0
Complex: 1

Positive Real: 1
Negative Real: 3 or 1
Complex: 2 or 0

Positive Real: 4, 2 or 0
Negative Real: 1
Complex: 0 or 1 or 3

Answer 1

2.
Which of the graphs below represent the function f(x) = - x3 + 4x2 - x + 3? You may sketch the graph to compare.

a. http://assets.openstudy.com/updates/attachments/528cf57ce4b0fd0888873470-lowcard2-1384969607252-04_04_10a.jpg

b. http://assets.openstudy.com/updates/attachments/528cf57ce4b0fd0888873470-lowcard2-1384969613519-04_04_10b.jpg

c. http://assets.openstudy.com/updates/attachments/528cf57ce4b0fd0888873470-lowcard2-1384969620514-04_04_10c.jpg

d. http://assets.openstudy.com/updates/attachments/528cf57ce4b0fd0888873470-lowcard2-1384969626663-04_04_10d.jpg