Answers to pre-test
|
|
1. Cubic ; positive ; 3
distinct real zeros |
|
2. Quadratic ; positive ; two identical real
zeros |
|
3. Quartic ; negative ; no real zeros |
|
4. Linear ; negative ; one real zero |
|
5. Cubic ; positive ; one real zero |
|
6. Quartic ; negative ; four distinct
real zeros |
|
7. Quadratic ; negative ; two distinct
real zeros |
|
8. Constant ; no leading coefficient ;
no real zeros |
|
9. Cubic ; negative ; one distinct and two
identical real zeros |
|
10. Quartic, positive ; two different sets of
identical real zeros |
11. f(x) = -
 (x
+ 4)(x + 1)(x - 2)(x - 5) |
12. f(x) =
 (x
- 1)(x + 3)2 |
13. f(x) =
 (x
- 1) |
|
14. f(x) = - 2(x - 1)2 |
|
15. f(x) =
(x
+ 3)(x - 2)3 |
16. f(x) =
 (x
+ 4)(x - 2)(x - 3) |
