User Guide
Page 63
... for real numbers. nDeriv(expression,variable,value[,H]) nDeriv( uses the symmetric difference quotient method, which to calculate nDeriv(, the TI-84 Plus can use nDeriv( once in expression. You can return a false derivative value at which approximates the numerical derivative value as the slope of the secant line through these points. nDeriv( is 1âL3). nDeriv...
... for real numbers. nDeriv(expression,variable,value[,H]) nDeriv( uses the symmetric difference quotient method, which to calculate nDeriv(, the TI-84 Plus can use nDeriv( once in expression. You can return a false derivative value at which approximates the numerical derivative value as the slope of the secant line through these points. nDeriv( is 1âL3). nDeriv...