Sharp EL-9900 User Manual
Page 49
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Chapter 3: Basic Calculations — Basic Keyboard
x
Enters an “x”, an unknown variable. Use this key when working
with graph equations. Refer to Chapter 4 “Basic Graphing
Features” to learn how to use this feature.
To access the second function of a key (printed above the keys in
yellow), press and release
@, then press the key you want to
use.
%
Set the preceding value as a percentage.
Example
• Get 25% of 1234.
1 2 3 4
| 2 5 @
% E
* Percentage must be a positive
value equal to or less than
100.
x
Enters “x
-
1
”, and returns an inverse by raising a value to the
-
1
power. The inverse of “5”, for example, is “
1
5
”.
Example
• Raise 12 to the
-
1 power. (= 0.083333333)
1 2
@ x E
Note:
When no base number is entered, “x
-
1
” will be entered, with “x” left
blank.
C @ x ;1 2 E
_
Enters “
a
”.
Example
• Bring 4 to the 5
th
root. (= 1.319507911)
5
@ _ 4 E
Note:
When no depth of power is entered, “
a
” is entered, with both
number areas left blank.
C @ _ 5 ' 4 E
+
Enters a square root symbol.
Example
• Obtain the square root of 64. (= 8)
@ + 6 4 E
Second
functions