Question about Casio FX-7400G Plus Calculator

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

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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


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1 Answer

Simplify logarithmic and exponential expressions

Simplifications of logarithmic expressions are based on the properties of logarithms

As to exponentials you have
That is the gist of it.
But I do not think that your calculator is able to handle any scientific calculations.

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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.

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What key do I need to press to put in expontenial and logarithmic functions?

The exponential function and the natural logarithm (LN) are inverse of one another. They share the same physical key. To calculate the natural log [LN] press the key marked LN and enter the number. Close the parenthesis) and press [=]
To calculate the exponential, use the key combination [SHIFT][LN] followed by the number.

Feb 25, 2011 | Casio FX-115ES Scientific Calculator

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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:

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How do you enter a logarithmic equation into my calculator?

The 30XIIS does not have the capability of solving equations. It can, however, calculate expressions using logarithms. Use the LOG key for common logarithms and the LN key for natural logarithms. In both cases, press the function key, enter the value or expression, and then ) to match the ( the function automatically enters.

The LOG and LN keys are the second and third keys from the top in the leftmost column of the keyboard.

Nov 13, 2010 | Office Equipment & Supplies

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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

1 Answer

I cannot figure out how to get the log key to look like this..log^-1. In my text book it said something about the ln button. That didn't work. Please help.

The logarithmic functions have inverse functions that happen to have specific names. Even if the log^-1 notation may found on textbooks you will not find it on claculators.

Natural Logarithms LN. The inverse function of the natural logarithm is the EXPONENTIAL noted e to the x or e^x. On calculators the two functions usually share the same physical key. For example, LN is accessed directly and e^x is accessed with

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

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
QuadReg :Quadratic y= ax^2+bx+c
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

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Which keys do i use to put in a logarithmic equation on a Casio fx-300MS?

For logarithms one uses one of two keys
  1. [LOG] for logarithms in base 10. It is in the same column as the F1 key, on 4th row
  2. [LN] for natural logarithms. It is in the same column as the F2 key, fourth row, to the right of the [LOG] key.
No, that is not right. This is for the FX-7400G (as specified in heading). Well too bad. The information is still valid, except for the location on the keypad. That should not be too difficult to find on the FX-300MS keypad.

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1 Answer

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

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