Question

The function f(x)=−6x³−6.93x²+52.7724x−2.19f(x)
is increasing on the open interval (  ,  ).

It is decreasing on the open interval ( −∞,  ) and the open interval (  , ∞ ).

The function has a local maximum at .

Question #2

The function f(x)=3x+9x−1 has one local minimum and one local maximum.
This function has a local maximum at x=   
with value    

and a local minimum at x=
with value

Answer 1