matlab - find Local Maximum and Minimum

Question

Hello can you help me with that I must find local maximum and minimum on interval (a;b) of the function

f(x)=x^3 /15 + cos(2pix^2)

a=1.32

b=1.98

I must use command find_root()

at first I found g=diff(f) and after that I wrote find_root(g,a,b) but it gave me only one root and if we look at the plot we can see there are another roots so can you give me a hint?

question from:https://stackoverflow.com/questions/65861104/find-local-maximum-and-minimum

Answer 1

Waitting for answers