Casio CLASSPAD330 - Graphing Calculator Manual de usuario descargar pdf (Pagina 6)

P1: FXS/ABE P2: FXS

9780521740524apxb.xml CUAU021-EVANS January 1, 1904 6:58

698 Essential Mathematical Methods Units1&2CAS

Combining fractions

This command gives an expression with a common

denominator and. The denominator is returned in

factored form.

Forexample:

Enter and highlight 1/(x − 1) + 1/(x + 1). Then select

Interactive—Transformation—combine.

Enter and highlight y/(x − y) + y/(x + y). Then select

Interactive—Transformation—combine.

Solve numerically

There are several ways to ﬁnd numerical solutions

to equations. In each of these ways, only one

solution is given. You can vary the guess (Value)

or the bounds of the search (Lower and Upper)

to ﬁnd particular solutions. If an expression

such as x

− x − 2.1isentered without an equals

sign, the calculator will assume the expression is

equal to zero and solve the equation.

Forexample:

Enter and highlight x

− x − 2.1 = 0, select

Interactive—Equation/inequality—solve and

tap the solve numerically option. Note that the

lower and upper bounds are set to ∞ and a

guess of –1 has been entered to return the

ﬁrst solution: 1.03297.

For the second solution shown, the ﬁrst line has been copied and pasted (or dragged) to the

next entry line and the guess x = 2 has been entered to return the solution x = 2.03297.

Alternatively, use from the Main menu and

enter Lower and Upper bounds. A guess may also be

entered, but is not necessary.

Note:

The bounds selected arise from a quick

sketch which indicated that the quadratic equation

has one positive and one negative solution.

A third method involves using the Graph program and ﬁnding the solution using the

GSolve application.

Cambridge University Press • Uncorrected Sample Pages •

2008 © Evans, Lipson, Wallace TI-Nspire & Casio ClassPad material prepared in collaboration with Jan Honnens & David Hibbard

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Casio CLASSPAD330 - Graphing Calculator Manual de usuario Pagina 6

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