Question about Texas Instruments BA-II Plus Calculator

I need to solve the problem 20-18e^(-.10), and I don't know how to enter it into my calculator. The answer should be 3.71, but i keep on getting 19.83.

Hello,

To use the exponential function, **you must enter the number then press [2nd][e to the x] or [e^x] for short.**

e^(-0.1) is entered as (-)0.1 [2nd][e^x], where **(-)** is the change sign key

You will need to use extra parentheses to avoid errors.**20 - 18*( (-)0.1 [2nd][e^x] ) [=]**

The Minus sign between 20 and 18 is the regular one. The** (-) **before the 0.1 is the change sign key **(-)** or sometimes labeled** +/-**. The asterisk is the multiplication sign.

Hope it helps.

Posted on Oct 15, 2009

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Posted on Jan 02, 2017

Here it is.

Aug 11, 2015 | Texas Instruments BA II Plus Professional...

If you do not have the Enter Exponent key (EE) you can use the general power key marked [Y^x], the one above the [9] key. Use parentheses to enclose the (10^23) and (10^28).

Frankly, if you have to do many calculations of this kind, better buy yourself a scientific calculator.

Frankly, if you have to do many calculations of this kind, better buy yourself a scientific calculator.

Jun 30, 2014 | Texas Instruments BA II PLUS Financial...

Were you also clearing the financial memory with 2nd [CLR TVM], or just the storage memory? If you don't, it's going to keep using whatever value you last used for PMT.

Mar 01, 2014 | Texas Instruments BA-II Plus Calculator

Actually, you don't need the y^x key.

Clear the financial registers with 2nd [CLR TVM]

Enter the present value: 1 0 0 0 0 0 0 +/- FV

Enter the future value: 2 0 0 0 0 0 0 FV

Enter the interest rate: 7 I/Y

Compute the number of periods: CPT N

Clear the financial registers with 2nd [CLR TVM]

Enter the present value: 1 0 0 0 0 0 0 +/- FV

Enter the future value: 2 0 0 0 0 0 0 FV

Enter the interest rate: 7 I/Y

Compute the number of periods: CPT N

Mar 24, 2013 | Texas Instruments BA II PLUS Financial...

Make sure you use the +/- key (located just right of the decimal point key) to enter a negative number. For example, to raise 3 to the -2 power, press 3 y^x 2 +/- =

Jan 13, 2013 | Texas Instruments BA II PLUS Financial...

The BA-II Plus is designed for financial applications. It does not do fractions, as do some calculators intended for school use.

Sorry if that wasn't the answer you wanted to see, but there it is.

Sorry if that wasn't the answer you wanted to see, but there it is.

Sep 03, 2011 | Texas Instruments BA-II Plus Calculator

25 = 23e^x

25/23 = e^x

ln 25/23 = x

Press 2 5 / 2 3 = LN

25/23 = e^x

ln 25/23 = x

Press 2 5 / 2 3 = LN

May 19, 2011 | Texas Instruments BA-II Plus Calculator

2nd [CLR TVM] (clear TVM registers)

2 4 0 0 +/- PV ($2400 initial investment, negative because you're paying it out)

6 I/Y (6% annual interest)

1 N (one year)

CPT FV (compute future value, see 2544.00, the value after one year)

5 N (five years)

CPT FV (see 3211.74, the value after five years)

1 0 N (ten years)

CPT FV (see 4298.03, the value after ten years)

2 4 0 0 +/- PV ($2400 initial investment, negative because you're paying it out)

6 I/Y (6% annual interest)

1 N (one year)

CPT FV (compute future value, see 2544.00, the value after one year)

5 N (five years)

CPT FV (see 3211.74, the value after five years)

1 0 N (ten years)

CPT FV (see 4298.03, the value after ten years)

Feb 19, 2011 | Texas Instruments BA II PLUS Financial...

The BA II+ does not have a key for the common logarithm function. You can calculate the common log of a number by calculating its natural log and then dividing by the natural log of 10.

log10(x) = ln(x)/ln(10)

The same procedure works for logarithms to any base.

log10(x) = ln(x)/ln(10)

The same procedure works for logarithms to any base.

Dec 14, 2010 | Texas Instruments BA II PLUS Financial...

There is no common logarithm key. You can compute the common (base 10) log of any number by using the relationship log(x) = ln(x) / ln(10).

For example, to compute the log of 2, type 2 LN / 1 0 LN =

For example, to compute the log of 2, type 2 LN / 1 0 LN =

Dec 14, 2010 | Texas Instruments BA II PLUS Financial...

Sep 11, 2014 | Texas Instruments BA-II Plus Calculator

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