Please solve by handDetermine the approximate forward difference representation of for $de{l}^3\frac{f}{d}el{x}^3,$ which is of the

order of $O(x)$ using Taylor series expansion.

$($Hint: The answer involves four$-$points computational molecule$/$stencil$,$ including those at $x,x+$

$x,x+2x,$ and $x+3$