At exactly two of the labeled points in the figure below, which shows a function f, the derivative f' is zero; the second derivative f'' is not zero at any of the labeled points. Select the correct signs for each of f, f' and f'' at each marked point.

Question

anonymous · Answer

i have to find where in each point f, f' and f'' are either -,+ or neither

agent0smith · Answer

Those images i posted in your last question should help here. http://derivative-functions.cours-de-math.eu/exo-advance-math11.GIF http://assets.openstudy.com/updates/attachments/517a1344e4b0c3f42e513e0e-agent0smith-1366956104635-graph.png Plus there's probably some other things in that question that can give you everything you need for this question. It's easy to find where f is negative - wherever it's below the x axis. Above the x axis means f is positive (think of it this way - the y axis has positive values above the x-axis and negative values below the x-axis)

anonymous · Answer

so for the first derivative how would i check

anonymous · Answer

ohh wait so for the first derivative i have to see the slope correct

agent0smith · Answer

Yes - just look at the slope. The graph going upwards to the right means positive f', downward to the right means negative f'.

anonymous · Answer

thank you i have a similiar question like this can you guide me through it lol

agent0smith · Answer

Sure