- #1
alancj
- 58
- 0
Ok, a multiple choice question wants me to:
"State the possible number of imaginary zeros of g(x)=x^4+3x^3+7x^2-6x-13."
(A) 3 or 1
(B) 2, 4, or 0
(C) Exactly 1
(D) Exactly 3
Using Descartes Rule of Sings I get:
Exactly 1 positive zero, 3 or 1 negative zeros, and 0 or 2 Imaginary zeros. They only want imaginary but I gave you the pos. and neg. because I used them to figure out the imaginary ones with a chart, like below.
|P_|_N_|_I_|
| 1 | 3 | 0 | 1+3+0=4
| 1 | 1 | 2 | 1+1+2=4
I've done similar questions given in my book and I've gotten them all right but for this question there is no option for what I found as you can see.
Am I right and the test question is just wrong? Did I do something wrong? I have gone over the book's example a thousand times and I don't see any other way.
Thanks,
Alan
"State the possible number of imaginary zeros of g(x)=x^4+3x^3+7x^2-6x-13."
(A) 3 or 1
(B) 2, 4, or 0
(C) Exactly 1
(D) Exactly 3
Using Descartes Rule of Sings I get:
Exactly 1 positive zero, 3 or 1 negative zeros, and 0 or 2 Imaginary zeros. They only want imaginary but I gave you the pos. and neg. because I used them to figure out the imaginary ones with a chart, like below.
|P_|_N_|_I_|
| 1 | 3 | 0 | 1+3+0=4
| 1 | 1 | 2 | 1+1+2=4
I've done similar questions given in my book and I've gotten them all right but for this question there is no option for what I found as you can see.
Am I right and the test question is just wrong? Did I do something wrong? I have gone over the book's example a thousand times and I don't see any other way.
Thanks,
Alan