Sorry for this long, but i seem to be getting half of these right.

Veteran  May 25, 2017

1+0 Answers


f'' is positive when f is concave up    x<-1  and x>6

f'' is negative when f is concave down   0

f''=0 when f is not concave up or concave down     -1



Non-differentiable  at  x=-1 and x=0


If you find out that any of these are incorrect then please let me know but I think they are all ok. :)

Melody  May 25, 2017

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