Adding an additional variable (Derivative(expr, name, name2)) takes the second derivative.
Floor( 2.7 );
2
Floor( –.5 );
–1
Modulo( 6, 5 );
1
Returns the numerical derivative of the f( x,... ) function with respect to one of its arguments. You can specify that argument as the second argument in the Num Deriv function. If no second argument is specified, the derivative is taken with respect to the function's first argument. The derivative is evaluated using numeric values specified in the f( x,... ) function expression.
The Num Deriv() function might appear not to produce the correct results as seen here:
// 9.00000000001455
x = 3;
f = Function( {x}, 3 * x ^ 2 );
n = Num Deriv( f( x ), 1 );
// 18.000029999854
Returns the numerical second derivative of the f( x,... ) function with respect to x. The derivative is evaluated using numeric values specified in the f( x,... ) function expression.