Question

f(x)= 3x squared -2x -6. Determine the minumum value.

Answer 1

\[\text{If you mean this:}\\f(x)=3x^2-2x-6\]
For f(x) to be minimum (or maximum), df/dx must be zero. Then:
\[\frac{df(x)}{dx}=6x-2=0\\6x=2\\x=\frac13\]

Answer 2

I know its a mimumum because its positive. I just dont understand. it says the answer is minimum of -19/3

Answer 3

Try plug my answer to f(x) :)

Answer 4

im going to try :) thanks!