HP 50g Graphing Calculator User Manual

Page 89

Page 2-29

We can now copy this expression and place it in the denominator of the LN
argument, as follows:‚¨™™… (27 times) … ™

ƒƒ

… (9 times) … ƒ ‚¬

The line editor now looks like this:

Pressing ` shows the expression in the Equation Writer (in small-font format,
press the

@BIG soft menu key):

Press ` to exit the Equation Writer.

Creating and editing summations, derivatives, and integrals

Summations, derivatives, and integrals are commonly used for calculus,
probability and statistics applications. In this section we show some examples
of such operations created with the equation writer. Use ALG mode.

Summations

We will use the Equation Writer to enter the following summation:

Press ‚O to activate the Equation Writer. Then press ‚½to enter the
summation sign. Notice that the sign, when entered into the Equation Writer
screen, provides input locations for the index of the summation as well as for the
quantity being summed. To fill these input locations, use the following
keystrokes:

~„k™1™„è™1/~„kQ2

The resulting screen is:

∑

∞