Question

True or false?
Not sure I don’t want to get this wrong

Answer 1

From the graph you can see that:

• function is increasing (f'>0);
• then decreasing (f'<0);
• then again increasing (f'>0);
• again decreasing (f'<0);
• at last increasing (f'>0).

This gives you 4 turning points, where the derivative changes the sign: 2 maxima (f increasing and then decreasing) and 2 minima (f decreasing and then increasing).

Answer: true.