Question:
(a). Use a graph of f to give a rough estimate of the intervals of concavity and the coordinates of the points of inflection.
(b). Use a graph of f" to give better estimates. 
Transcribed Image Text:
f(x) = cos x + cos 2x, 0
(a). Use a graph of f to give a rough estimate of the intervals of concavity and the coordinates of the points of inflection.
(b). Use a graph of f" to give better estimates.
f(x) = cos x + cos 2x, 0
