Question

need help on the attachment

Answer 1

The highest power of f(x) determines the number of roots (where f(x)=0). For example f(x)= x^3 will have 3 roots.
When you take the derivative f'(x) will go down a power. so f'(x) will have 2 roots. and f''(x) will have only 1 root.

Answer 2

so its neither A or B

Answer 3

I repeat, and f''(x) will have only 1 root.

Answer 4

oh, so its actually just A

Answer 5

yes

Answer 6

Thanks!