HP Prime Graphing NW280AAABA manual Interval2center Returns the center of an interval

id Returns a vector containing the solution to the identity function for the argument(s).

id(Object1, [Object2,…])

Example:

id([1 2], 3, 4) returns [[1 2] 3 4]

identity Given an integer n, returns the identity matrix of dimension n.

identity(Integer)

Example:

identity(3) returns

1 0 0

0 1 0

0 0 1

iegcd Returns the extended greatest common divisor of two integers.

iegcd(Integer1, Integer2)

Example:

iegcd(14, 21) returns [-1, 1, 7]

igcd Returns the greatest common divisor of two integers or two rational numbers or two polynomials of several variables.

igcd((Integer1, Integer2) or igcd(Ratnl1, Ratnl2) or igcd(Poly1, Poly2)

Examples:

igcd(24, 36) returns 12

igcd(2/3,3/4) returns 1/12

interval2center Returns the center of an interval.

interval2center(Interval)

Example:

interval2center(2..5) returns 7/2

inv Returns the inverse of an expression or matrix.

inv(Expr) or inv(Matrix)

Example:

inv(9/5) returns 5/9

396 Functions and commands