Question about Texas Instruments TI 30XIIS Scientific Calculator

I get 1.393.. and it should be .3891

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1.393 is the correct answer for the natural log of (1/37 + 4). I believe you want natural log(1/37) + 4, which is .3891 .

Watch those parenthesis. By putting the "+4" inside, you're doing the addition before calculating the log. You want to calculate the log and then add 4.

Posted on Nov 27, 2012

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Posted on Jan 02, 2017

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To convert a result from symbolic to numeric, press diamond ENTER. To have all results appear in numeric form, press MODE F2, use down-arrow to get to the "Exact/Approx" line, press right-arrow, down-arrow to "3:APPROXIMATE", press ENTER ENTER.

Feb 07, 2013 | Texas Instruments TI-89 Calculator

You're looking for a number whose natural logarithm is -5. In other words, you're looking for the natural antilogarithm of -5. To calculate this, press

2ND [e^x] (-) 5 ENTER

2ND [e^x] (-) 5 ENTER

Apr 30, 2012 | Texas Instruments TI-83 Plus Calculator

Let me give you a general recipe to familiarize yourself with any calculator, if you are averse to reading the manuals.

Most function will work in one of two ways.

1st way

Enter the number, then press the key,; the result is displayed.immediately.

Second way

Press the function key ( a left parenthesis may be displayed) enter the number (close the right parenthesis if there was a left one) press the = or EXE or ENTER keys.

Try the two ways described above to calculate the following values. The answers are given. Here log is he decimal logarithm and ln is the natural logarithm.

log(1)=0

ln(1)=0

ln(2)=0.693147181

log(2)=0.301029996

ln(100)=4.605170186

log(10)=1 (= number of zeros after the 1)

log(100)=2. (= number of zeros after the 1)

log(1000)=3 (number of zeros after the 1)

log(10000)=4 (number of zeros after the 1)

Most function will work in one of two ways.

1st way

Enter the number, then press the key,; the result is displayed.immediately.

Second way

Press the function key ( a left parenthesis may be displayed) enter the number (close the right parenthesis if there was a left one) press the = or EXE or ENTER keys.

Try the two ways described above to calculate the following values. The answers are given. Here log is he decimal logarithm and ln is the natural logarithm.

log(1)=0

ln(1)=0

ln(2)=0.693147181

log(2)=0.301029996

ln(100)=4.605170186

log(10)=1 (= number of zeros after the 1)

log(100)=2. (= number of zeros after the 1)

log(1000)=3 (number of zeros after the 1)

log(10000)=4 (number of zeros after the 1)

Aug 17, 2011 | Texas Instruments TI-30 XIIS Calculator

To calculate the common log ( LOG base 10) of a positive number, just press the LOG key, the one above the blue Division key, then enter the number and close the right parenthesis. Press the ENTER key to get the result.

If you want to calculate the log in a base other than e (natural) or 10 (decimal) logarithms, you need to make use of one of the equivalent formulas below

log in base a of a number b

log_a(b)=log_10(b) / [ log_10(a)] or

log_a(b)= ln(b)/ln(a)

If you want to calculate the log in a base other than e (natural) or 10 (decimal) logarithms, you need to make use of one of the equivalent formulas below

log in base a of a number b

log_a(b)=log_10(b) / [ log_10(a)] or

log_a(b)= ln(b)/ln(a)

Apr 19, 2011 | HP 39g Calculator

First of all, to compute the log of a number, enter the number first then press the LOG key.

Second, to compute the log to a base b other than e or 10, use the relationship

logb(x) = log(x) / log(b) = ln(x) / ln(b)

You can use either the common log (log) or the natural log (ln), as long as you're consistent.

So, to calculate log2(2.5), press

2 . 5 log / 2 log =

or

2 . 5 ln / 2 ln =

Second, to compute the log to a base b other than e or 10, use the relationship

logb(x) = log(x) / log(b) = ln(x) / ln(b)

You can use either the common log (log) or the natural log (ln), as long as you're consistent.

So, to calculate log2(2.5), press

2 . 5 log / 2 log =

or

2 . 5 ln / 2 ln =

Feb 04, 2011 | Texas Instruments TI-30 Xa Solar...

For the inverse natural log, press 2nd LN. For the inverse common log, press 2nd LOG.

For example, to calculate the inverse natural log of 2, press 2nd LN 2 ENTER and you'll get about 7.389 .

For example, to calculate the inverse natural log of 2, press 2nd LN 2 ENTER and you'll get about 7.389 .

Jan 25, 2011 | Texas Instruments TI-86 Calculator

For natural logarithms Press [2nd][X], enter a positive number, close the right parenthesis and press [ENTER]. If the number is decimal the result is displayed as a number. If the number is integer, put a decimal mark at its end to have the result displayed as decimal.

For decimal logarithms use the ALPHA keyboard to enter the log( command, complete the argument and press ENTER

If you want to calculate log in base a of number b type log(b,a).

For decimal logarithms use the ALPHA keyboard to enter the log( command, complete the argument and press ENTER

If you want to calculate log in base a of number b type log(b,a).

Apr 13, 2010 | Texas Instruments TI-89 Calculator

You can calculate the logarithm to any base by using the relationship

logb(x) = log(x) / log(b) = ln(x) / ln(b)

Thus, if you calculate log(64) / log(2), you will get 6, and the same with the natural logarithm.

logb(x) = log(x) / log(b) = ln(x) / ln(b)

Thus, if you calculate log(64) / log(2), you will get 6, and the same with the natural logarithm.

Mar 12, 2010 | Texas Instruments TI-85 Calculator

Hello,

**Common logs **

[LOG] displays log( on home screen. Enter a positive number, close right parenthesis ans press [ENTER].

**Natural logs **

[LN] number [)] [ENTER].

Hope it helps.

[LOG] displays log( on home screen. Enter a positive number, close right parenthesis ans press [ENTER].

[LN] number [)] [ENTER].

Hope it helps.

Sep 23, 2009 | Texas Instruments TI-83 Plus Calculator

To get an exponent press 2nd then LN or LOG

LN is natural logs, so entering 1 then 2nd LN gives you the natural exponent of 1 which is.2.71828....pressing LN gives you the natural log of 2.71828.... which is 1

LOG is logs to base 10, so entering 1 then 2nd LN gives you the 10 to the power 1 which is.10, pressing LOG gives you the log of 10 which is 1 again

LN is natural logs, so entering 1 then 2nd LN gives you the natural exponent of 1 which is.2.71828....pressing LN gives you the natural log of 2.71828.... which is 1

LOG is logs to base 10, so entering 1 then 2nd LN gives you the 10 to the power 1 which is.10, pressing LOG gives you the log of 10 which is 1 again

Dec 04, 2008 | Texas Instruments TI-30XA Calculator

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