SCIENTIFIC CALCULATOR

11 The natural logarithms as well as powers of E with the calculator

Natural logarithms such as are able to be analyzed on your calculator using the key. The other function of this key ( ) allows for the calculation of power of . It is important to note that an approximate value for itself can be found by using the key sequence ( ).

Remember that is the same thing as. Certain calculators use a key rather than .

20. Calculating natural logarithms and the powers of E

Calculate the amount of each of the following with your calculator and then give the answers to 3 important figures.

Get the answer

12 Calculator reference guide

Calculator different modes

General types

The calculator is able to function in several different modes:

  • COMP is a term utilized for general calculations.
  • STAT is used to calculate statistical data.
  • TABLE, which is used to create tables using numbers.

COMP is short for "computation', and STAT is short for'statistics'..

Comp mode is selected by making use of the keys sequence (COMP).

Mathematics methods

There are two distinct ways where mathematics can be presented to and displayed on the calculator:

  • Math mode, in which fractions are entered and shown in their proper mathematical form For instance, - and some irrational numbers will be shown as surds (such as ) or multiples of (such as ).Math mode is selected by entering the key sequence (SETUP) (MthIO).
  • Linear mode, in which fractions such as are entered and displayed using a linear notation - for example, 2 3 - and all irrational numbers (such as and ) are displayed as decimal approximations.Linear mode is selected by using the key sequence (SETUP) (LineIO).

In simple terms, an irrational number is one that is unable to be represented as a simple fraction.

You can tell that you're in Math mode if the word Math appears on the right hand side of the highest point of the calculator display. If it isn't, you are using Linear mode.

In Math mode, you can force the answer to display in decimal form either switch between the mathematical and decimal outputs by .

Fraction display modes

One can set the calculator so that answers which are heavy on top (such for ) are always presented in mixed number format (such as ).

  • To set your calculator to display mixed numbers, use to enter the keys sequence (SETUP) (ab/c).
  • To configure the calculator to display as top-heavy fractions, make use of to set the keysequence (SETUP) (d/c).

Decimal display modes

The calculator is able to show decimal numbers in different ways:

  • Normal 1 (Norm 1) mode uses scientific notation for any value less than 0.01 however greater than -0.01 however, it displays answers according to the decimal spaces they contain within the limits that is possible on the screen. This mode can be entered by using (SETUP) (Norm) .
  • Normal 2 (Norm 2) mode employs scientific notation of any number that is less than 0.000000001 but higher than -0.000000001 but provides answers to whatever decimal points they have in the limit that can be accommodated on the screen. The mode can be accessed via (SETUP) (Norm) .
  • Scientistic notation mode (Sci) displays all decimal numbers in scientific notation by using a specific number of important figures. This mode is entered using (SETUP) (Sci) followed by the amount of significant figures needed for example . When you are using your calculator is set to this mode the display indicator SCI is shown.
  • Fixed decimal place setting (Fix) displays every decimal number to an appropriate quantity of decimal points (unless scientific notation is required to match the result to the display). The mode is set by (SETUP) (Fix) followed by the number of decimal places needed, for instance . If you're calculator is set in this mode it displays an indicator for FIX is shown.

12.1 Display indicators

These are symbols that are displayed upon the calculator display to show its status at present.

Symbol on display Meaning
This key has been pressed.
You have pressed the key has been hit.
M A value is recorded in the memory of 'M'.
STO The key STORE ( (STO)) has been held.
RCL The RECALL ( ) key was held.
The calculator is programmed to measure angles measured in degrees.
The calculator is calibrated to measure angles in radians.
The calculator is set to measure angles in gradians.
FIX The calculator is set to display answers to a fixed number of decimal places.
SCI The calculator will display results in scientific notation and some fixed numbers of relevant figures.
Math The calculator has been set to utilize Math mode to input and display.
STAT The calculator is in statistics mode.
There's more info available that can be displayed and can be accessed through the up and down keys.
The line shown is larger than it can be displayed on the screen. Other lines can be displayed using scrolling using the left/right cursor keys: or .

12.2 Common operations

To Key sequence
Turn on
Turn off (OFF)Note this calculator will automatically turn off in the event that it is not used for more than 6 minutes.
Adjust the display contrast (SETUP) () then use it and adjust, and press when completed.
Restore the factory settings (CLR) (Setup) (Yes)
Clear out the contents of all memories (CLR) (Memory) (Yes)
Restore the default settings , then clear all memories (CLR) (All) (Yes)
Refuse to calculate a number, or exit menus
Find out the answer
Find a decimal answer using Math mode
Toggle between exact and decimal responses in Math mode
You can toggle between showing fractions as mixed numbers or fractions that are incorrect in Math mode
Utilize the results of this calculation...
... e.g. to find 42 times the previous result.
Record a value in memory called 'M' (STO) (M)
Clear the value stored in the M memory (STO) (M)
Add a value to that in the memory 'M'
Subtract a value from that in the memory of 'M'. (M-)
Display the value that is stored in the memory of 'M'. (M)
Make use of the 'M' memory in the calculation...
... e.g. to find 42 minus the number in the memory "M" (M)
The angles that are to be measured in degrees (SETUP) (Deg)
Be sure to measure angles measured in Radians (SETUP) (Rad)
Set answers to be presented in three decimal places (To use a different number of decimal places, substitute with the number) (SETUP) (Fix)
Set answers to be displayed in scientific notation , with 3 significant figures (To utilize a different number that is significant, substitute with that number) (SETUP) (Sci)
You can cancel any settings for display rounding. (SETUP) (Norm)

The A B, C D, X, and Y memories are utilized similarly to memories in the M memory with the exception that these have no add to' or subtract from' functions.


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