HP Prime Graphing NW280AAABA manual NDerivfx,x,h returns fx+h-fx-h*0.5/h, NormalExpr, OddInteger

nDeriv Given an expression, a variable of differentiation, and a real number h, returns an approximate value of the derivative of the expression, using f’(x)=(f(x+h)–f(x+h))/(2*h).

Without a third argument, the value of h is set to 0.001; with a real as third argument, it is the value of h. With a variable as the third argument, returns the expression above with that variable in place of h.

nDeriv(Expr,Var, Real) or nDeriv(Expr, Var1, Var2)

Example:

nDeriv(f(x),x,h) returns (f(x+h)-(f(x-h)))*0.5/h

NEG Unary minus. Enters the negative sign.

normal Returns the expanded irreducible form of an expression.

normal(Expr)

Example:

normal(2*x*2) gives 4*x

normalize Given a vector, returns it divided by its l2 norm (where the l2 norm is the square root of the sum of the squares of the vector’s coordinates).

Given a complex number, returns it divided by its modulus.

normalize(Vector) or normalize(Complex)

Example:

normalize(3+4*i) gives (3+4*i)/5

NOT Returns the logical inverse of a Boolean expression.

not(Expr)

odd Returns 1 if a given integer is odd, and returns 0 otherwise.

odd(Integer)

Example:

odd(6) gives 0

OR Logical Or. Returns 1 if either or both sides evaluates to true and 0 otherwise.

Expr1 OR Expr2

Example:

3 +1==4 OR 8 < 5 returns 1

Functions and commands 403