8/Integrals - Casio fx-180P Manual De Operación

8/ INTEGRALS
'To carry out integrals. (D define (write) function fix) during the "LRN" mode.
then (D designate the interval of integral during the "Idx" mode.
o a' v I Tb :x
N equal parts
'The approximation method used for integrating the function written in P1 or P2
is the Simpson's rule. This method requires to divide the interval of integral into
equal parts. If the number of divisions is not specified, the calculator determines
it by itself according to the form of the function. To specify it. designate u (an
integer of 1 to 9) which meets N a 2" where N is the number of divisions.
I Defining function f(x/
1) Select the "LRN" mode (press ).
2) Designate a program number (press ['5] or l.
3) Press .
to the M-register.
4) Write the expression of function fix) by true algebraic logic. Use [E to represent
variable x. Write B at the end.
1 .
Example: For ((x/ =-;-,——, write the sequence of 1, -:-, l(. MR, INV x' . +. 1. )l. =.
+1
5) Press E) to select the "fix" mode.
Note: For a function {Ix} whose variablex cannot take the zero value. input an appro.
priate number in between steps 1) and 2) above.
Do not use constant registers. a . and during expressing a function
(step 4).
I Execution of integral
1) Select the"!dx" mode (press E) l.
2) Designate the program number assigned to the function. fix). (Press [5] or E) .)
3) Press a sequence of n S to specify division number N (this will be displayed).
This step may be skipped.
4) Designate the interval of integral. la. b]. (Pressa 8 b8 .)
' In seconds or minutes the result will be displayed in a floating point representa
tion.
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