Casio FX-85ES PLUS Manual De Usuario

E-24

 

 

 

 

3

3

 + 3 

2

 – 

 

 

         

(INEQ)(aX

3

 + bX

2

 + cX + d) 

 

                        

(aX

3

 + bX

2

 + cX + d 

 0) 

  

 

3 

 3  1  

 

 

 

 

 

CCC 

Note:  Solutions are displayed as shown 
here when Linear Display is selected. 

• “All ” appears on the solution screen when the solution of an inequality is 

all numbers.  

 

  

2

 

>

 

                  

(INEQ)(aX

2

 + bX + c) 

 

                                  

(aX

2

 + bX + c 

> 0) 

  

 

1 

 0  0  

• “NOT FOUND” appears on the solution screen when no solution exists for   
  an inequality (such as X

2

 < 0). 

The RATIO Mode lets you determine the value of X in the ratio expression  

 : 

 = X : 

 (or 

 : 

 = 

 : X) when the values of 

, 

, 

 and 

 are known. The 

following shows the general procedure for using RATIO. 

1. Press 

(RATIO) to enter the RATIO Mode.

2. On the menu that appears, select the 

(a:b=X:d) or (a:b=c:X). 

3. On the Coefficient Editor screen that appears, input up to 10 digits for each 

of the required values (

, 

, 

, 

). 

• To solve 3 : 8 = X : 12 for X, for example, press 

 in step 1, and 

then input the following for the coefficients (

 = 3, 

 = 8, 

 = 12): 

3 

 8  12 .

• To change a coefficient value you already have input, move the cursor 

to the appropriate cell, input the new value, and then press 

. 

• Pressing 

 will clear all of the coefficients to zero.