User Manual

2-25
k Solving an f ( x ) Function [OPTN] - [CALC] - [SolvN]
You can use SolvN to solve an
f ( x ) function using numerical analysis. The following is the input
syntax.
SolveN (left side [=right side] [,variable] [, lower limit, upper limit])
• The right side, variable, lower limit and upper limit all can be omitted.
• “left side[=right side]” is the expression to be solved. Supported variables are A through Z,
r ,
and θ . When the right side is omitted, solution is perform using right side = 0.
• The variable specifies the variable within the expression to be solved for (A through Z,
r , θ ).
Omitting a variable specification cause X to be used as the variable.
• The lower limit and upper limit specify the range of the solution. You can input a value or an
expression as the range.
• The following functions cannot be used within any of the arguments.
Solve(,
d
2
/dx
2
(, FMin(, FMax(, Σ (
Up to 10 calculation results can be displayed simultaneously in ListAns format.
• The message “No Solution” is displayed if no solution exists.
• The message “More solutions may exist.” is displayed when there may be solutions other
than those displayed by SolvN.
Example To solve
x
2
– 5 x – 6 = 0
K4(CALC) * 5(SolvN)
vx-fv-g)w
* fx-7400GIII: 3(CALC)
J
k Differential Calculations [OPTN] - [CALC] - [ d / dx ]
To perform differential calculations, first display the function analysis menu, and then input the
values using the syntax below.
K4(CALC) * 2( d / dx ) f ( x ) ,a ,tol ) * fx-7400GIII: 3(CALC)
(
a : point for which you want to determine the derivative, tol : tolerance)
The differentiation for this type of calculation is defined as:
d
/
dx

(

f

(
x
)
,
a
)

⇒
f

(
a
)
dx
d
f
(
a
+
A
x
)–
f
(
a
)
f
(
a
) = lim
–––––––––––––
A
x
A
x
→
0
'