Hp 50g Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 113)

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Pressing the soft menu key corresponding to p1 will provide an error message

(try L @@@p1@@ `):

Note: By pressing @@@p1@@ ` we are trying to activate (run) the p1 program.

However, this program expects a numerical input. Try the following exercise:

$@@@p1@ „Ü5`. The result is:

The program has the following structure: <<

→ r 'π*r^2' >>

The « » symbols indicate a program in User RPL language. The characters

→ r

indicate that an input, to be referred to as r, is to be provided to the program.

The action from the program is to take that value of r and evaluate the

algebraic '

π*r^2'. In the example shown above, r took the value of 5, and thus

the value of

πr

= π⋅25 is returned. This program, therefore, calculates the area

of a circle given its radius r.

RPN mode

In RPN mode, you only need to press the corresponding soft menu key label to

get the contents of a numerical or algebraic variable. For the case under

consideration, we can try peeking into the variables z1, R, Q, A12,

α, and A,

created above, as follows: J@@z1@@ @@@R@@ @@@Q@@ @@A12@@

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Hp 50g Graphing Calculator Uživatelský manuál Strana 113

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