Consider the function f(x)=x^3. the value of its first derivative at point x=3 numerically with forward finite difference formula ...
solve 0.45 times 72
-16+x=-15
solve 0.45 x k=72
-143=-11x
solve 0.45xk=72
x/x2
20-10
$\frac{5}{2}$k - $\frac{-2}{3}$ = $\frac{-11}{6}$
6a/2b
