I've done all bar four questions for an assignment, which I'm stuck on; if anyone could help me or point me in the right direction then I'll be in your debt.

Question 74

Show the central difference formula of the second derivative of order O(h^4) is expressed by:

d^2f/dx^2 = (-f(i-2) + 16f(i-1) - 30f(i+1) - f(i+2))/ 15h^2