HP Prime Graphing Wireless Calculator Uživatelský manuál stáhnout pdf (Strana 76)

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Reusing the last result

Press (Ans) to retrieve your last answer for use in another calculation. Ans appears on the

entry line. This is a shorthand for your last answer and it can be part of a new expression. You could now enter

other components of a calculation—such as operators, number, variables, etc.—and create a new calculation.

TIP: You don’t need to rst select Ans before it can be part of a new calculation. If you press a binary

operator key to begin a new calculation, Ans is automatically added to the entry line as the rst component of

the new calculation. For example, to multiply the last answer by 13, you could enter

13 . But the rst two keystrokes are unnecessary. All you need to enter is 13

The variable Ans is always stored with full precision whereas the results in history will only have the precision

determined by the current Number Format setting (see Page 1 on page 20). In other words, when you retrieve

the number assigned to Ans, you get the result to its full precision; but when you retrieve a number from

history, you get exactly what was displayed.

You can repeat the previous calculation simply by pressing . This can be useful if the previous

calculation involved Ans. For example, suppose you want to calculate the nth root of 2 when n is 2, 4, 8, 16,

32, and so on.

1. Calculate the square root of 2.

2. Enter √Ans.

This calculates the fourth root of 2.

28 Chapter 2 Getting started

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