diff of order n around a point x0

Hello,

I would like to calculate the derivative of order n of function f with respect to x aaround a point x0.

diff(f,x,x0,n) but doesn't work

Any help!!

Thank you in advance.

Adam

Answer 1

[Wayne King]

Do you have the Symbolic Toolbox and an expression for your function?

syms t
x = cos(2*t);
y = diff(x,2)
subs(y,0) %evaluate the 2nd derivative at t=0

[adam]

Hello, Thank you for your answer. Yes, I have the symbolic toolbox.

I would like make sum of diff(x) for exemple for order n going from 0 to 5. I tried:

{symsum(diff(x,n), n, 0, 5)}

it dipalys an error. Thank you in adavance. Good day, Aam