Question about Texas Instruments TI-30XA Calculator

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Need help plugging 1+4700e^-4 into the calculator, I really would appreciate help! I cant seem to get the correct combination!

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1 + 4 7 0 0 * (-) 4 2nd [e^x] =

(-) is the key to the right of the decimal point key.
e^x is the shifted function of the LN key on the top line.

Posted on Mar 24, 2011


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What are the buton combonations for the factory reset on an android tablet

There are few combinations and you'll have to be quick to get the moment to press all 3 at once. Don't work every time as you have only a second or less to press the correct combination:

Each phone manufacturer has its own Recovery Mode key combinations.

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I need help on plugin 249e^0.24? how do i enter "e" and how do i plug in the exponent 0.24 that follows.Please if anyone could please explain this to me step by step i higjly appreciate it thank you

2 4 9 * 2nd LN 0 . 2 4 =

The "0" isn't really necessary. The formula as written implies the multiplication between the 249 and the e, the calculator requires the multiplication.

Oct 14, 2012 | Texas Instruments TI-30XA Calculator

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Fx-115es Help if I input 1.5-.5 it gives correct answer "1"continue with answr*25.4 it gives me 645.16 not "25.4"? It seems to handle whole numbers correctly like 5-4

It seems to me that it is doing its calculations correctly: 645,16 happens to be just the square of 25.4. Which makes me believe that you must have pressed the square key (maybe you did not notice).

Aug 27, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How do i calculate combinations

Your calculator has three keys, next to which are the following markings:n! , nCr, and nPr. The one with the exclamation point is for factorials. The second is for combinations, and the third with permutations.
Syntax of the command.
If the markings are on the keys, the functions are accessed directly. If the markings are on the body of the calculator, you access the functions by pressing SHIFT and the key.

12 [!] gives 12 factorial
12 [nCr] 4 gives the combinations of 12 objects taken 4 at a time (order not important)
12 [nPr] 4 gives the permutations of 12 objects taken 4 at a time (order is important.)

Jun 09, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

How do I add Exponents on my T1-30xa calculater

There is a rule of Algebra, that says
(a^m)[x] (a^n) = a^(m+n)

a is the base of the power, n, and m are the exponents. As you can see, multiplying two powers of the same base is equal to the power of the (common) base with the sum of the exponents.
If that is what you had in mind, the calculator uses the rule correctly and no intervention from you is necessary.
If you enter (2^4)[x](2^6), the calculator will give 1024, which is 2^10.

I may be wrong, but what you call add exponents refers really to performing addition where addends (the terms you add) are arbitrary powers, such as
2^7 + (5.5^3) - (1/3)^4

Once you enter a power term, the calculator calculates it and the result is now just a number. It can be added, subtracted, multiplied

For the exemple above
2 [Y to the x] 7 + (5.5)[Y to the x] 3 -(1/3) [Y to the x] 4 [=] yields 294.3626543

For the cube of 5.5 you can use the key combination [2nd][X^3]

Hope it helps.

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Is there a combination button on this calculator?

Sorry, answer was posted as a clarification request. Read below

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Change your air filter if it hasn't been changed recently. Spark plugs, plug wires and fuel filter can also make a difference.

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2 problems

check if it has a mode button, press mode then deg.

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