Think about concavity and points of inflection
essentially, I am given different graphs, and the functions are not given. From the graph, i have to answer where the first derivative is positive or negative, where the second derivative is positive or negative, etc.
I understand when the first derivative is positive and negative (when the gradient of the slope f(x) is positive or negative respectively). I dont understand when the second derivative is positive or negative, its confusing me. Can someone explain...? Thanks for your help.
This is the worksheet im currently doing.
sorry its a bit big, and basically i am confused about what second derivative and first derivative measures.
say for Question 2v , where is it negative? (i have the answers but don't know how to arrive at them)
i also dont understand Q3ii and Q3 iii
for question 4, f'(6) = 2, i dont know what this means.. and also i dont get Q4iv
and i dont understand q5 and q6ii and q6iii
Sorry, i have so many questions, but i need help, i have a test in 2 days... =[.