User manual - fx-5800P

E-17
Function Key Operation *1 *2
Derivative
z
– {MATH}
2
(d/dX) 7 Yes
Second Derivative
z
– {MATH}
3
(d
2
/dX
2
)7Yes
Σ
Calculation
z
– {MATH}
4
(
Σ
() 11 Yes
Note
If you include values or expressions in parentheses (
(
and
)
) while using natural
display, the height of the parentheses will adjust automatically depending on whether they
enclose one line or two lines. Regardless of their height, opening and closing parentheses
take up one byte of memory each.
Inputting Calculation Expressions Using Natural Display
1. To input a specifi c function, perform the operation in the “Key Operation” column of the
“Scientifi c Functions that Support Natural Display” table.
2. At the input fi elds indicated by

, input the required values and expressions.
• Use the cursor keys to move between the input fi elds of the expression.
Example: To input
1 + 2
2 × 3
B
Specify fraction input:
'
Input the numerator:
1+2
Move the cursor to the denominator:
c
Input the denominator:
2*3
Execute the calculation:
E
Important!
• Certain types of expressions can cause the height of a calculation formula to be greater
than one display line. The maximum allowable height of a calculation formula is two
display screens (31 dots × 2). Further input will become impossible if the height of the
calculation you are inputting exceeds the allowable limit.
• Nesting of functions and parentheses is allowed. Further input will become impossible if
you nest too many functions and/or parentheses. If this happens, divide the calculation
into multiple parts and calculate each part separately.