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So, this week we learned the second derivative test and the first derivative shortcut(a little late?).

So, to do the second derivative test you basically do the same thing as the long way of the first one just with the second derivative.
First: Take the derivative and set =0(haha a face) and solve
Next: Take the 2nd derivative and set =0 and solve
Thirdlyful: Take the 3rd derivat... I mean check to see if its differentiable and find out where its not

AfterStep3: Set up Intervalmajiggers
Fifth: Pick some numbers from your intervals and plug into the second derivative
Next: If you get positive, you have ai...i mean its concave up, if negative you aren't preg...i mean its concave down
Lastly: Where it goes from up to down, or down to up, or up to not up, there is a point of inflection, which is apparently important.

First derivative test shortcut oh my
First, take the derivative set =0(theres that face again) and solve
next, find your not differentiable areas
third, plug in critical points to the second derivative
last: if positive you get a min, negative its not a min, 0 then you suc... i mean the test doesn't work