Sharp EL-5230 - Manual (Page 41)

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• To exit the differential function, press j.
• After getting the answer, press e to return to the display for inputting
the x value and the minute interval, and press @ h to recalculate
at any point.
* X memory is specified by pressing ; then the 3 key.
Integral function
The Integral function is used as follows.
1. Press b 0 to enter the NORMAL mode.
2. Input a formula with an x variable.
3. Press {.
4. Input the starting value (a) of a range of integral and press e.
5. Input the finishing value (b) of a range of integral and press e.
6. Input the subinterval (n).
7. Press e to calculate.
• To exit the integral function, press j.
• After getting the answer, press e to return to the display for inputting
a range of integral and subinterval, and press @ h to recalculate
at any point.
Chapter 3: Scientific Calculations
Example Key operations Result
d/dx (x 4 –0.5x 3 +6x 2 ) j ; X* m 4 - 0.5
; X 1 + 6 ;
X A @ 3
x = 2
dx = 0.00002
d/dx = ?
2 e e
x = 3
dx = 0.001
d/dx = ?
e 3 e 0.001 e
≈^4-0.5≈„+6≈Œ
≈=z 0.
dx: 0.00001
≈^4-0.5≈„+6≈Œ
d/dx=
50.
≈^4-0.5≈„+6≈Œ
d/dx=
130.5000029