HP 40gs Manual do Utilizador descarregar pdf (Página 261)

100

101

Equation Writer 15-9

Select the fifth branch by

pressing . At this point,

the desired expression is in

the Equation Writer, as

shown at the right.

Suppose that you want to select the second and third

branches, that is: . First press . This selects ,

the second term.

Now press . This

key combination enables

you to select two contiguous

branches, the one already

selected and the one to the

right of it.

If you want, you can

evaluate the selected part by

pressing . The result

is shown at the right.

Suppose now you want to

perform the partial calculation:

Because the two terms in this partial calculation are not

contiguous (that is, side by side), you must first perform a

permutation so that they are side by side.To do this,

press:

This exchanges the selected

element with its neighbour to

the left. The result is shown at

the right.

Now press:

to select just the branches

you are interested in:

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