Sharp EL-5230 Integral function, Example, Key operations, Result, d/dx x 4-0.5 x 3+6 x, dx =

Chapter 3: Scientific Calculations

•To exit the differential function, press j.

•After getting the answer, press eto return to the display for inputting the x value and the minute interval, and press @hto recalculate at any point.

Example	Key operations	Result
d/dx (x4–0.5x3+6x2)	j;X* m4 -0.5	≈^4-0.5≈„+6≈Œ
	;X 1+6 ;
		≈=z	0.
	X A@3	dx:	0.00001
x = 2	2 ee
		≈^4-0.5≈„+6≈Œ
dx = 0.00002
		d/dx=	50.
d/dx = ?
x = 3	e3 e0.001e	≈^4-0.5≈„+6≈Œ
dx = 0.001
		d/dx=
d/dx = ?		130.5000029

* X memory is specified by pressing ;then the 3key.

Integral function

The Integral function is used as follows.

1.Press b0to 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 eto calculate.

•To exit the integral function, press j.

•After getting the answer, press eto return to the display for inputting a range of integral and subinterval, and press @ hto recalculate at any point.

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