- Thread starter
- Admin
- #1

- Feb 14, 2012

- 3,941

- Thread starter anemone
- Start date

- Thread starter
- Admin
- #1

- Feb 14, 2012

- 3,941

- Admin
- #2

\(\displaystyle f''(x)=12x^2+54x+2c\)

Requiring the discriminant to be positive gives us:

\(\displaystyle 54^2-4(12)(2c)>0\)

\(\displaystyle c<\frac{243}{8}\)

- Thread starter
- Admin
- #3

- Feb 14, 2012

- 3,941

Hi **MarkFL**,

Thanks for participating and your answer is correct!

Thanks for participating and your answer is correct!