@grogror Because the numerator in your expression should be x^4 - (x - epsilon)^4.
@grogror I assume you're using the formula [ f( x + epsilon) - f(x) ] / epsilon? So [(x + epsilon)^4 - x^4]/epsilon.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
@grogror I assume you're using the formula [ f( x + epsilon) - f(x) ] / epsilon? So [(x + epsilon)^4 - x^4]/epsilon.