SCIENTIFIC CALCULATOR

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

Natural logarithms like those, for example logarithms that are natural, for example, can be assessed using an calculatorusing using the key. Another function of this key ( ) allows the calculation of power that are equal to . It is important to note that an approximate value for itself can be calculated using the key sequence ( ).

Take note that refers to that it is the same as. Some calculators feature the key rather than .

20. Calculating natural logarithms and powers of E

Calculate the worth of each of these with your calculator by submitting the answers to 3 important figures.

Answer the question

12 Calculator reference guide

Calculator modes

General types

The calculator operates in many different modes:

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

COMP is a short form for 'computation and STAT is the abbreviation for'statistics'..

Comp mode can be chosen using the key sequence (COMP).

Mathematics and mathematics modes

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

  • Math mode, where fractions are entered and displayed in their mathematically correct form - for example, and some non-rational numbers can be displayed in surds (such as ) or multiples of (such as ).Math mode is chosen following the sequence of keys (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).

Simply put, an irrational number is one which cannot be expressed in terms of a simple fraction.

You will know you are in Math mode if the word Math appears on the right-hand side of the uppermost part of your calculator display. If it isn't then you're in Linear mode.

In Math mode, you can force the answer to display as a decimal using the decimal option, and switch between decimal and mathematical outputs by .

Fraction display modes

There is the option to configure the calculator to ensure that the answers that are heavy on top (such in ) will be presented in mixed number format (such such ).

  • To make your calculator to display as mixed numbers, use this key sequence (SETUP) (ab/c).
  • To make the calculator to display as top-heavy fractions use the sequence key (SETUP) (d/c).

Decimal display modes

The calculator is able to display decimal numbers in various different ways:

  • Normal 1 (Norm 1) mode uses scientific notation for numbers less than 0.01 but greater than -0.01 however, it displays answers to however decimal locations they can be within the limits that can fit on the display. This mode can be accessed via (SETUP) (Norm) .
  • Normal 2 (Norm 2) mode uses scientific notation for any value less than 0.000000001 but larger than -0.000000001 but it still displays the answers in whatever decimal locations they are available, subject to the maximum that is possible on the screen. This mode can be entered by using (SETUP) (Norm) .
  • Scientific notation mode (Sci) displays the decimal number in scientific notation with the number of significant figures. This mode is entered using (SETUP) (Sci) followed by the number of significant figures to be used such as . When your calculator is set in this mode the display indicator SCI will be shown.
  • Fixed decimal point modes (Fix) displays all decimal numbers in the specified amount of decimal spaces (unless the use of scientific notation required to match the result to the display). This mode can be entered by (SETUP) (Fix) followed by the decimal number needed, such as . When you're calculator is set in this mode, there is a display indication FIX is shown.

12.1 Display indicators

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

Symbol on display Meaning
A key was hit.
The key was hit.
M A value is recorded in the memory called 'M'.
STO The key STORE ( (STO)) is press.
RCL The RECAL ( ) key has been pressed.
The calculator is configured to measure angles in degrees.
The calculator is configured to measure angles measured in Radians.
The calculator is configured to measure angles using Gradians.
FIX The calculator will display results to a predetermined the number of decimal positions.
SCI The calculator is set to display answers in scientific notation with an undetermined number of important figures.
Math This calculator will use Math mode for input and display.
STAT The calculator is in statistical mode.
There's more info available that can be displayed and it can be accessed using the up/down cursor keys.
The displayed line is longer than what can fit on the display. Other areas of the line can be displayed using scrolling using the left/right cursor keys: along with .

12.2 Common operations

To Key sequence
Turn on
Turn off (OFF)Note this calculator will shut down automatically in the event that it is not used for more than 6 minutes.
Modify the display's contrast (SETUP) () Then use the settings and adjust, and then press when done.
Restore factory settings (CLR) (Setup) (Yes)
Clear out the contents of all memories (CLR) (Memory) (Yes)
Restore the default settings and clear all of the memories (CLR) (All) (Yes)
Refuse to calculate a number, or quit menus
Find an answer
Find a decimal answer using Math mode
Switch between decimal and exact answers in Math mode
Switch between showing fractions as mixed numbers or fractions that are incorrect in Math mode
Use the result of the previous calculation...
... e.g. to find 42 times the previous result
A value is stored in memory with the letter 'M' (STO) (M)
Clear a value stored in M memory (STO) (M)
Create a new value in the memory 'M'
Subtract a value from that in the memory of 'M'. (M-)
Display the value that is stored in the 'M' memory (M)
Utilize the number in the memory 'M' in the calculation...
... e.g. to find 42 less the value of the memory "M" (M)
Set angles which will then be measured as degrees (SETUP) (Deg)
Determine angles which will be measured using radians (SETUP) (Rad)
Set the answer to be displayed in 3 decimal places (To choose a different number of decimal decimal places, replace with the appropriate number) (SETUP) (Fix)
Set answers to be displayed in scientific notation with 3 significant figures (To use a different number of figures with significance, replace by that number) (SETUP) (Sci)
Cancel any display rounding settings (SETUP) (Norm)

The A B, C, D and X Y memories are used in the same manner as the M memory, with the exception that they don't have any 'add to' and 'subtract from' functions.


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