Casio fx-115ES Manual De Usuario

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E-17
Answer Memory (Ans) /Previous Answer Memory 
(PreAns)
The last calculation result obtained is stored in Ans (answer) memory.  The 
calculation result obtained prior to the last one is stored in PreAns (previous 
answer) memory. Displaying the result of a new calculation will move current 
Ans memory contents to PreAns memory and store the new calculation 
results in Ans memory. PreAns memory can be used only in the COMP 
Mode. PreAns memory contents are cleared whenever the calculator enters 
another mode from the COMP Mode.
 
To divide the result of 3 
× 4 by 30  b
  
* 4 =
 
 
(Continuing)    
/ 30 =
 
123 + 456 = 579    
B  123 + 456 = 
 
789 – 579 = 210  
 
 
(Continuing)    789 
-G=
 For 
T
k+2  
= T
k+1
 + T
k
 (Fibonacci sequence), determine the sequence 
 from 
T
1
 to T
5
. Note however, that T
1  
= 1 and T
2  
= 1.  
B
 
T
1  
= 1 
=
    
(Ans 
T
1  
= 1)
 
T
2  
= 1 
=
   
(Ans 
T
= 1, PreAns = T
1  
= 1)
 
T
3  
= T
2
 + T
1  
= 1 + 1
 
 
G+SG(PreAns)=
   
(Ans 
T
3  
= 2, PreAns = T
2  
= 1)
 
T
4  
= T
3
 + T
2  
= 2 + 1 
=
   
(Ans 
T
4  
= 3, PreAns = T
3  
= 2)
 
T
5  
= T
4
 + T
3  
= 3 + 2 
=
Result:  The sequence is {1, 1, 2, 3, 5}.