Using Memory - Sharp EL-531LH Mastering Instructions

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Mastering the Calculator using the Sharp EL-531LH
Factorial rule
The number of ways of arranging n items in order is known as 'factorial n' which is
symbolised as n! where:
n! = n × (n – 1) × (n – 2) × ... × 3 × 2 × 1
9.

Using memory

To calculate the following it may be useful to use the memory key for each term:
Example:
2 2
( ) ( )
9 16 – 23 16 –
--------------------- - ------------------------ -
+
16 16
2
( )
17 16 –
------------------------ -
+
16
these keys are for memory