HP NW280AAABA Manual do Utilizador descarregar pdf (Página 331)

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101

Functions and commands 325

Substitute Substitutes a value for a variable in an expression.

Syntax: subst(Expr,Var=value)

Example:

subst(x/(4-x^2),x=3) returns -3/5

Partial Fraction Performs partial fraction decomposition on a fraction.

partfrac(RatFrac or Opt)

Example:

partfrac(x/(4-x^2)) returns (-1/2)/(x-2)-(1/2)/

((x+2)

Extract

Numerator Simplified Numerator. For the integers a and b, returns the

numerator of the fraction a/b after simplification.

numer(a,b)

Example:

numer(10,12) returns 5

Denominator Simplified Denominator. For the integers a and b, returns the

denominator of the fraction a/b after simplification.

denom(a/b)

Example:

denom(10,12) returns 6

Left Side Returns the left side of an equation or the left end of an

interval.

left(Expr1=Expr2) or left(Real1..Real2)

Example:

left(x^2-1=2*x+3) returns x^2-1

Right Side Returns the right side of an equation or the right end of an

interval.

right(Expr1=Expr2) or right(Real1..Real2)

Example:

right(x^2-1=2*x+3) returns 2*x+3

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