Programming instructions

Mathematical Calculations
30
function, and continue calculating with your original operation without losing your
work.
Two-Number Functions
Apart from +-*/, the three additional two-number functions
accessible on the keyboard are:
 Y
x
 nCr
 nPr
Y
x
is the power function; nCr stands for the number of combinations of elements,
r , among n , and nPr stands for the number of permutations of elements, r , among
n .
nCr=n!/(r!(n-r)!)
nPr=n!/(n-r)!
Perform calculations with these functions in the same way you would perform
calculations with +-/ and *, but press : to access the
secondary function key. For example, to calculate 15
3
:
1. Press 15.
2. Press :h.