Texas Instruments TI-86 Manual Book page 306

294
Chapter 20: A to Z Function and Instruction Reference
!
Factorial:
MATH PROB menu
fcstx
† STAT menu
fcsty
† STAT menu
ExpR
Uses xStat , yStat , and
equation to RegEq only.
number ! or ( expression
Returns the factorial of a real integer or non-integer,
where 0  integer  449 and 0  non-integer  449.9. For
a non-integer, the Gamma function is used to find the
factorial. An expression must evaluate to an appropriate
value.
list !
Returns a list in which each element is the factorial of
the corresponding element in list.
fcstx yValue
Based on the current regression equation (
returns the forecasted
fcsty xValue
Based on the current regression equation (
returns the forecasted
fStat , and stores the regression
) !
ReqEq
at a real yValue.
x
ReqEq
y at a real xValue.
6! b
12.5! b
{6,7,8}! b
),
),
720
1710542068.32
{720 5040 40320}