HP Prime Graphing NW280AAABA Creating your own functions, Inserts the imaginary number, Expr

ΣInserts a template for a summation expression.

−Inserts a minus sign.

√Inserts a square root sign.

∫Inserts a template for an antiderivative expression.

≠Inequality test. Returns 1 if the left and right sides are not equal and 0 if they are equal.

≤Less than or equal inequality test. Returns 1 if the left side of the inequality is less than the right side or if the two sides are equal, and 0 otherwise.

≥Greater than or equal inequality test. Returns 1 if the left side of the inequality is greater than the right side or if the two sides are equal, and 0 otherwise.

Evaluates the expression then stores the result in variable var. Note that  cannot be used with the graphics G0–G9. See the command BLIT.

expression  var

iInserts the imaginary number i.

–1	Returns the inverse of an expression.
	(Expr)–1

Creating your own functions

You can create your own function by writing a program (see chapter 27) or by using the simpler DEFINE functionality. Functions you create yourself appear on the User menu (one of the Toolbox menus).

Suppose you wanted to create the function

SINCOS(A,B)=SIN(A)+COS(B)+C.

1.Press Sd(Define).

2.In the Name field, enter a name for the function—for example, SINCOS—and tap .

Functions and commands 421