HP 40gs Manuel d'utilisateur télécharger pdf (Page 192)

100

101

14-10 Computer Algebra System (CAS)

For example, suppose you have stored the expression x

in G, and have defined the function F(x) as x

. Suppose

now you want to calculate INTVX(X

). You could:

• enter INTVX(X

) directly, or

• enter INTVX(G), or

• enter INTVX(F(X)).

Note that you can apply the command directly to an

expression or to a variable that holds an expression (the

first two cases above). But where you want to apply it to

a defined function, you need to specify the full function

name, F(X), as in the third case above.

ALGB menu

COLLECT Factors over the integers

COLLECT combines like terms and factors the expression

over the integers.

Example

To factor over the integers you would type:

COLLECT(X

–4)

which gives in real mode:

Example

To factor over the integers you would type:

COLLECT(X

–2)

which gives:

DEF Define a function

For its argument, DEF takes an equality between:

1. the name of a function (with parentheses containing

the variable), and

2. an expression defining the function.

DEF defines this function and returns the equality.

4–

x 2+()x 2–()⋅

2–

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HP 40gs Manuel d'utilisateur Page 192

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