The TI-68 delivers 254 of the most advanced

engineering, science and math functions. Yet the

calculator is easy-to-use and a great value, too.

The TI-68 sets new standards for

advanced scientific calculators:

The cal-

culator solves up to five simultaneous

equations with real or complex coeffi-

cients. You can solve two or three

equations relatively easily on paper,

but handling more than that is a real

challenge. There's a greater chance of

error when you try to solve four or five

simultaneous equations manually, so

a calculator like the TI-68 becomes

very useful.

With the TI-68 you can solve simul-

taneous equations directly. To guide

you through each equation a plain-

English prompting system asks you to

input the coefficients.

Many physical

properties, particularly those we

encounter in electricity and mechanics,

can't be described without using com-

plex numbers. But try to operate on

complex numbers using many calcula-

tors and all you get is an error message.

The TI-68 evaluates 40 complex-

number functions from simple arith-

metic to advanced trigonometry. And

you don't have to enter a special mode

or one with limited capabilities to use

these functions.

You can enter complex numbers just

as you'd write them on paper - using

polar coordinates, rectangular coor-

dinates or a combination. The TI-68 is

the first calculator that can handle a

combination of polar and rectangular

coordinates in the same equation.

The display simultaneously shows

both the real and the imaginary part of

the complex number. You can scroll left

and right to read a long number or fix

the decimal point to keep the entire

number within one screen. You also

can select the coordinates in which

your results will be displayed - polar

or rectangular.

Research underscores the value stu-

dents and technical professionals place

on being able to check their entries

and verify their answers quickly and

easily. With the last equation replay fea-

ture you can recall, check and edit the

last equation you calculated.

The last equation replay feature

eliminates the need to reenter your

work, and you can replay one equation

even after you've started to enter a

second one.

If an error message should appear in

the display, you can use the last equa-

tion replay feature to help determine

the cause. In this case the calculator

places the cursor at a point where you

might start looking to edit the equation.

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The TI-68

provides up to 440 steps of formula

programming, and you can develop as

many as 12 formulas.

Entering and running programs is

easy with the TI-68. The calculator's

alphanumeric capabilities simplify

program-writing and editing. The dot-

matrix display shows you the formula

exactly as you enter it - there are no

operation codes to learn.

The TI-68 prompts you to enter each

variable in order, and you can nest for-

mulas to simplify long calculations.

Constant MemoryM feature retains

formulas even when you turn the cal-

culator off.

You can store

values in up to 36 memory registers and

give each register a meaningful name of

up to three characters. The first charac-

ter of each name must be a letter; sub-

sequent characters can be numbers or

letters. Constant Memory feature

preserves the contents of every register.

Uses Simpson's rule

to perform numerical integration, a

function useful in calculus. You can

integrate a formula you've previously

entered and integrate on any variable

in a formula. The TI-68 prompts you to

provide the upper and lower integra-

tion limits and the number of intervals.

You can even specify the level of preci-

sion you require by changing the num-

ber of intervals.

Automati-

cally calculates the real and complex

roots of quadratic, cubic and quartic

equations (second, third and fourth-

order polynomials). The TI-68 prompts

you for each coefficient and labels

each root.

Performs one- and two-

variable statistical functions including

linear regression and trend analysis.

You can perform

arithmetic calculations using decimal,

hexadecimal, octal or binary numbers.

You also can combine different number

bases within a calculation.

You can use the calculator to perform

number-base conversions and the

Boolean logic operations fundamental

to computer programming.

Performs 18 additional

conversions including polar/rectangu-

lar, English/metric and angular

measurements using degrees, radians

and grads.

include

reciprocals. Powers and roots.

Logarithms. Hyperbolic functions.

Combinations and permutations.

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