HP 38g Graphing Calculator User Manual
Page 38
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Long Results
Negative
Numbers
Scientific
Notation
powers of 10)
If the result is too long to fit in the display line, press 0 to
highlight it and then press
{{SHOW}}.
Type [^to start a negative number or to insert a negative
sign.
If a negative number will be raised to a power, enclose it in
parentheses. For example, (—5)^= 25, whereas - 5^= - 25.
A number like 5x10"' or 3.21x10"' is written in
scientific
notation,
that is, in terms of powers of ten. This is simpler to
work with than 50000 or 0.000000321. To enter numbers like
these, use [EEX]. (This is easier than using fillOfx^.)
Example
(4xl0"')(6xl0')
Calculate ------------------------ as shown :
3x10
4TEEXini3F]6
■ [EEX] 2 0 3® [EEX]
FF|5 I ENTER I
4E-3*6E2x3E-5
80000
Explicit and
You should include the times sign where you expect
Implicit
multiplication in an expression. It is clearest to enter AS as
Multiplication
and
A(B+C]
as
A* (B+c).
Implied
multiplication takes place when two operands appear
with no operator in between. If you enter
AB,
for example, the
result is
A* B.
Parentheses
Parentheses are necessary to enclose arguments for
functions, such as
SIN
(
4 5
). You can omit the final
parenthesis at the end of an edit line.
Parentheses are also important in specifying the order of
operation. Mf/toui parentheses, the HP 38G calculates
according to the order of
algebraic precedence
(the next
topic). Following are some examples using parentheses.
2-2 Mathematical Calculations