Question about Casio FX-7400G Plus Calculator

# Logarithmic functions How do you solve logarithmic functions on your casio CFX-9850GC PLUS?

Posted by on

### Anonymous

• Level 2:

An expert who has achieved level 2 by getting 100 points

MVP:

An expert that got 5 achievements.

Vice President:

An expert whose answer got voted for 100 times.

Sniper:

An expert who has posted more than 50 answers, of which 90% or more were rated as helpful.

• Expert

All calculators it's the same:
log x base y = log x / log y
log (x*y) = log x + log y
log (x/y) = log x - log y
the default base in all the calculators is 10 so instead of writing log 4 base 2 you simply need to write log 4 / log 2
Hope you understand :)

Posted on Jul 06, 2009

×

my-video-file.mp4

× ## Related Questions:

### How to use casio 9850GC PLUS to solve equations in polar form?

Put the calculator in Equation solving mode. Select F3:Solver. Enter your equation; use X as unknow (no need to use Theta, the name of the variable is irrelevant.) Besides if you use theta you will get a syntax error.

Jun 29, 2012 | Casio CFX 9850GB Plus Calculator

### Where is antilog function in Casio fx-570ES PLUS?

A name can bring a lot of confusion. The decimal logarithm has an inverse function which is raising a number to a power of 10. It shares the same physical key as the logarithm LOG.

May 15, 2012 | Casio FX570ES Scientific Calculator

By 'log inverse', you presumably mean the inverse of the logarithm function. There are two logarithm functions on most scientific calculators. Firstly [ln], or natural logarithms, to the base e, where the inverse is e^x. Secondly [log], or logarithms to the base 10, where the inverse is 10^x.

Example 1 : ln(2) = 0.69314718 so e^0.69314718 = 2
Example 2: log(2) = 0.301029995 so 10^0.30102995 = 2

Oct 02, 2011 | Casio FX-115ES Scientific Calculator

### I have a Casio CFX-9850GC PLUS. How do I check the angle between 2 vectors, please?

The angle between two vectors a and b is calculated as the inverse cosine of the inner product of a and b, divided by the product of the lengths of the two vectors: For 2-dimensional resp. 3-dimensional vectors this boils down to: Jan 09, 2011 | Casio FX-115ES Scientific Calculator

### The buttons of my casio cfx-9850GC plus ( buttons f1,f2,f3,f4,f5,f6) dont work. What can I do to solve my problem???

First of all check its warranty, if exists, concern the authorized dealer or representative. If not unscrew your calculator and clean keypad with a wet white cotton cloth by rubbing gently you will see black spots on the cloth. place the keypad at where it was placed previously. You will find it working as usual. INSHALLAH.

Oct 08, 2010 | Casio FX-9750GPlus Calculator

### Defining the domain of the function to be graphed using casio cfx-9580g plus

One simple way to define the domain to be graphed is to set the limits of the domain as the Xmin and Xmax dimensions of the window.

Jun 19, 2010 | Casio CFX-9850G Plus Calculator

### Do i have only one type of exponencial regression o my 9850gb plus?

Hello,
Th CFX-9850GB Plus is programmed to perform 10 types of regressions, namely
LinearReg: Linear y=ax+b
Med-Med also linear y=ax+b
Cubic: y=ax^3+bx^2+cx+d
Quartic: y=ax^4+bx^3+cx^2+dx+e
LogReg, logarithmic: y=a+b*ln(x)
ExpReg, exponential y=a*e^(bx)
PowerReg, power: y= ax^b
SinReg, sinusoidal: y=a*sin(bx+c) +d
LogisticReg, logistic; y= c/(1+a*e^(-bx))

There may be more regression models appropriate for more advanced (specialized) statistics but the ones in the list are all the CFX-9850GB plus offers. However, since the calculator knows a programming language, you may want to implement a particular model.

Hope that helps.

Oct 24, 2009 | Casio CFX 9850GB Plus Calculator

### The calculator wont recognise the blue funtion buttons (1-6)

Clear the ram:
1. Press [MENU]2. Press [tan] (MEM)3. Select RESET4. [F1] (yes)

May 14, 2009 | Casio CFX-9850G Plus Calculator

### I need to find out how to graph fuctions and the derivatives using a cfx 9850gc plus ASAP

Hello,
Let us start wih the derivatives. To obtain the values of derivatives at points on a graph, you must set Derivative to ON
Press [AC/On] to trun calculator on. If you do not see the icons press [MENU], with arrows select [RUN] and press[EXE] . The screen clears.
Press [SHIFT][SETUP ] . The first few options must be set as follows
Mode : : Comp
Function Type : Y=
Draw Type : PLot
Derivative : ON This is the one to make derivatives visible
Angle : Rad unles you have to use degrees.
Coord : on if you want the x,y coordinates to be displayed
Grid : Off
Axes : ON to display x and y axes
Press [EXE] to save options. You are taken to [Run] screen.
Press [Menu] Play with arrows to select [GRAPH] and press [EXE]

You see a list Y1=, Y2= and so on
On the line Y1=, enter [SIN] [X,Theta, T] .
If function is complicated you may have to enter parentheses sin(X). When you finish to enter the functions you want to draw, hit [F6:Draw]
The graphs are displayed.
Press [F1:Trace] The trace function allows you to move cursor along the curve, while it displays the coordinates of the cursor. And since you set Derivative to ON, the trace displays also the value of the derivative of the curve at the position of the cursor.

There are other intersting tools, under [Sketch] and [G-solve ] such as minimum, maximum, tangente, inverse of the function drawn, integral under the curve, intercepts with the coordinates axes, etc. I will not spoil your fun by giving you the plot of the movie.

Hope it helps.

Mar 27, 2009 | Casio CFX-9850G Plus Calculator

### I need to find standard deviation on my casio cfx-9850ga plus calculator

You need to pick a type of distribution, and you can of course use the local radius for the center of mass or Cho as well. sx is probably in the alpha or alternate key functions, unless you want sy or course, or need to translate sy back into the variable it produced your distribution from.

Jun 23, 2008 | Casio CFX 9850GA Plus Calculator

#### Related Topics:

819 people viewed this question

Level 3 Expert