2-4-6

Function Calculations

Problem

Use this keyboard:

 

Operation

 

 

 

 

mth

abc

cat

2D

 

 

 

 

 

 

 

 

 

 

What is the sign of

 

 

Func

 

[signum] - 3.4567 w

–3.4567?

 

–1

 

 

 

 

 

(signum returns –1 for a

 

 

 

 

 

negative value, 1 for a

 

 

 

 

 

positive value, “Undefined”

 

 

 

 

 

for 0, and

A

for an

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

imaginary number.)

 

 

 

 

 

 

 

 

 

 

 

What is the integer part of

CALC

 

Func

 

- 3.4567 w

–3.4567?

 

–3

 

 

 

 

 

 

 

 

 

 

 

What is the decimal part of

 

 

Func

 

[frac] - 3.4567 w

–3.4567?

 

–0.4567

 

 

 

 

 

 

 

 

 

 

 

What is the greatest integer

 

 

Func

 

[intg] - 3.4567 w

less than or equal to

 

 

 

 

 

–3.4567?

 

–4

 

 

 

 

 

 

 

 

 

 

 

What is –3.4567 rounded to

 

 

Func

 

[fRound] - 3.4567 ,2

two decimal places? –3.46

 

 

 

 

w

 

 

 

 

 

 

What is –34567 rounded to

 

 

Func

 

[sRound] - 34567 ,4

four significant digits?

 

 

 

 

w*

 

 

–34570

 

 

 

 

 

 

 

 

 

 

 

 

 

* To round to 10 digits, specify “0” for the second argument.

kRandom Number Generator (rand, randList, RandSeed)

•The ClassPad random number generator can generate truly random numbers (non- sequential random numbers) and random numbers that follow a particular pattern (sequen- tial random numbers). Using the “randList” function, you can generate a list whose elements contain random numbers. There are nine different patterns for generation of sequential random numbers. Use the “RandSeed” command to switch between non- sequential and sequential random number generation, and to select the sequential random number generation pattern.

u ClassPad Operation

(1)Use the “RandSeed” command to configure random number generation settings, if required.

(2)Use the “rand” function or “randList” function to generate the random numbers.

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