Hp 49g+ User Manual download pdf (Page 79)

Page 5-1

Chapter 5

Algebraic and arithmetic operations

An algebraic object, or simply, algebraic, is any number, variable name or

algebraic expression that can be operated upon, manipulated, and combined

according to the rules of algebra. Examples of algebraic objects are the

following:

• A number: 12.3, 15.2_m, ‘π’, ‘e’, ‘i’

• A variable name: ‘a’, ‘ux’, ‘width’, etc.

• An expression: ‘p*D^2/4’,’f*(L/D)*(V^2/(2*g))’,

• An equation: ‘p*V = n*R*T’, ‘Q=(Cu/n)*A(y)*R(y)^(2/3)*√So’

Entering algebraic objects

Algebraic objects can be created by typing the object between single quotes

directly into stack level 1 or by using the equation writer [EQW]. For

example, to enter the algebraic object ‘π*D^2/4’ directly into stack level 1

use:

An algebraic object can also be built in the Equation Writer and then sent to

the stack, or operated upon in the Equation Writer itself. The operation of the

Equation Writer was described in Chapter 2. As an exercise, build the

following algebraic object in the Equation Writer:

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 175 176

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Hp 49g+ User Manual Page 79