Find the actual error when the derivative of $f(x)=2 ln x$ at $x=2$ is approximated by the following 3 point formula $$ f^{\prime} (x) \approx \frac{-3 f(x-1)+4 f(x)-f(x+h)}2 h) $$ with $h=8.1$. Given that $f^{\prime) (2)=1$. $0.1550$ $1.9510$ $1.0500$ $0.95$ SP.SD.462|