HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Strona 74

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Entering... Calculates...
45
45
85 9
85 9
Algebraic precedence
The HP Prime calculator calculates according to the following order of precedence. Functions at the same
level of precedence are evaluated in order from left to right.
1. Expressions within parentheses. Nested parentheses are evaluated from inner to outer.
2. !, √, reciprocal, square
3.
n
th
root
4.
Power, 10
n
5. Negation, multiplication, division, and modulo
6. Addition and subtraction
7. Relational operators (<, >, ≤, ≥, ==, ≠, =)
8. AND and NOT
9. OR and XOR
10. Left argument of | (where)
11. Assign to variable (:=)
Negative numbers
It is best to press to start a negative number or to insert a negative sign. Pressing instead
will, in some situations, be interpreted as an operation to subtract the next number you enter from the last
result. (This is explained in Reusing the last result on page 28.)
To raise a negative number to a power, enclose it in parentheses. For example, (–5)
2
= 25, whereas –5
2
= –25.
Explicit and implied multiplication
Implied multiplication takes place when two operands appear with no operator between them. If you enter
AB, for example, the result is A*B. You can enter 14 8 without the multiplication operator
after 14. For the sake of clarity, the calculator adds the operator to the expression in history, but it is not
strictly necessary when you are entering the expression. You can, though, enter the operator if you wish. The
result will be the same.
26 Chapter 2 Getting started
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