The row of keys including :ln 4 5 6 - does not register in either first or second mode

Same thing happened to me except its 7 4 and 1 along with the "apps" "sin" and "," keys and it just registers as a 0. ( when i press those keys it puts in 0 on screen)

Posted on Sep 04, 2008

Yes, yes, and yes.

You may view/download a copy of the manual at Owners Manual User Guide for Sharp el 531x scientific calculator

You'll find examples of exponential and logarithmic calculations in the second column of the second page and the memory instructions in the fourth column of the first page.

You may view/download a copy of the manual at Owners Manual User Guide for Sharp el 531x scientific calculator

You'll find examples of exponential and logarithmic calculations in the second column of the second page and the memory instructions in the fourth column of the first page.

Jan 10, 2015 | Sharp el-531x scientific calculator

It's the leftmost key on the third row, marked "LN."

Feb 21, 2014 | Texas Instruments TI 30XIIS Scientific...

For ln use the LN key on the top row of the keyboard. For e^x use the 2nd function of the LN key.

Dec 30, 2013 | Texas Instruments TI-30XA Calculator

If you mean "raise e to the power of", it's the shifted function of the "ln" key, third row, rightmost column. If you mean "raise a number to a power" it's the "^" key, third row, third from the right.

Sep 11, 2012 | Calculators

The 12C does not have the common logarithm function built-in, but you can calculate it using the natural logarithm function (the blue g shift of the %T key, 2nd row, 3rd key).

The common logarithm of x is the natural logarithm of x divided by the natural logarithm of 10, or

log x = ln x / ln 10

Press 1 0 0 0 g [LN] 1 0 g [LN] /

and you'll get the result 3.

The common logarithm of x is the natural logarithm of x divided by the natural logarithm of 10, or

log x = ln x / ln 10

Press 1 0 0 0 g [LN] 1 0 g [LN] /

and you'll get the result 3.

Jun 06, 2011 | HP 12c Calculator

e^x is the 2nd function of the LN key, second from the right on the top row of the keyboard.

Nov 19, 2010 | Texas Instruments TI-30XA Calculator

Please use the following link to download the manual for your calculator.

http://www.devicemanuals.com/guide/Calculator/HP/HP-20s-Scientific-Calculator-Owner's-Manual-==TVRFME5UWTE=.html

http://www.devicemanuals.com/guide/Calculator/HP/HP-20s-Scientific-Calculator-Owner's-Manual-==TVRFME5UWTE=.html

Aug 28, 2010 | HP 20s Calculator

The inverse key is marked "1/x" (second key on the third row). The natural logarithm key is marked "LN" (fourth key on the top row).

Apr 13, 2010 | Texas Instruments TI-36 X Solar Calculator

Hi,

If the calculator has locked up you should perform a reset.

If it continues to malfunction, it will need to be repaired. One repair shop in Pennsylvania, USA has a website at http://www.fixthatcalc.com. You should contact them.

Hope it helps.

Thank you for rating the solution.

If the calculator has locked up you should perform a reset.

- Press and hold the [C] (ON/OFF) key
- Press and hold the [LN] key (third key from the left on the top row).
- Release both keys simultaneously. T
- The calculator should display "0.00" (if the number of decimal places is set to two.)

- Press and hold the [C] (ON/OFF) key.
- Press and hold the first key from the left ( the Square root x key) and the first key from the right (the SIGMA+ key ) on the top row.
- Release all three keys at the same time.
- Calculator should display "ALL CLr".
- To clear the message press the [C] (ON/OFF).
- The calculator should display "0.00."

- Remove the batteries, and
- with a metallic coin (and what coin is not metallica) short-circuit the calculator's electrical terminals.
- Maintain the coin for about ten seconds.
- Replace the batteries (preferably fresh ones) respecting the diagram inside battery compartment.
- The Calculator should display "ALL CLr".
- To clear the message press the [C] (ON/OFF).
- The calculator should display "0.00."

If it continues to malfunction, it will need to be repaired. One repair shop in Pennsylvania, USA has a website at http://www.fixthatcalc.com. You should contact them.

Hope it helps.

Thank you for rating the solution.

Nov 05, 2009 | HP 20s Calculator

Hello,

Use the [LN] key, the fith key from the bottom, on the first row left to [EE] key

[LN] ( 27/25) [ENTER] . Make sure you put the fraction inside parentheses to prevent the calculator from interpreting it as LN(27)/25.

Hope it helps.

Use the [LN] key, the fith key from the bottom, on the first row left to [EE] key

[LN] ( 27/25) [ENTER] . Make sure you put the fraction inside parentheses to prevent the calculator from interpreting it as LN(27)/25.

Hope it helps.

Oct 08, 2009 | Texas Instruments TI-85 Calculator

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