Sharp EL-531LH - Calculator Memory Functions

22 Mastering the Calculator using the Sharp EL-531LH
Factorial rule
9. Using memory
To calculate the following it may be useful to use the memory key for each term:
Example:
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
916–()
2
16
-
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23 16–()
2
16
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17 16–()
2
16
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++
these keys are for memory