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How can I do factorials on a TI-84 plus calculator?

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Expert Answer

To calculate a factorial on a TI-84 calculator, navigate through the menu options. You can access it by pressing the "Math" key and then locating the factorial function. This is often conveniently placed in the "Favorites" menu due to its frequent use. Alternatively, you may find it under "Math" and then "Number." Explore the options in the "Number" menu, and specifically check under "NUM" for numeric calculations. Once you've located the factorial function, select it to perform the calculation.

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Is there a short cut?

Donagan

Top Answerer

The factorial notation is the short cut. For example, you can write 8! instead of writing 8x7x6x5x4x3x2x1 = 40,320.

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Question

How do I calculate factorials of floating point numbers like 0.5?

Donagan

Top Answerer

A factorial is defined as involving integers only.

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Question

Why and where is the 0! = 1 used?

Technist

Community Answer

A simple problem with straightforward factorials would be: "How many ranges can you arrange n objects?" Here n is 0, and technically, there's only 1 way of arranging it. As for where, you might sometimes get problems related with combinatorics or the binomial theorem such as 12C12 or 4C0, which expand to 12! / (0!12!) and 4! / (0!4!), respectively. That's where 0! will appear.

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How do I calculate the factorial of a really big number like 37?

Community Answer

37! is small enough that modern computers will have no problem printing out all 44 digits if you want them. For factorials too large to compute directly, Stirling's approximation formula is a quicker way to estimate the size of n!

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How do I find the factorial of 121?

Donagan

Top Answerer

Use a factorial calculator. You can find one online at CalculatorSoup.com or RapidTables.com.

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Question

How do I write numbers in factorial form?

Donagan

Top Answerer

Twelve factorial is written "12!"

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Question

How to find factorial of a large digit number easily?

Donagan

Top Answerer

Assuming you don't have a scientific calculator, there is no "easy" way to do this. Use a regular calculator to perform all the multiplications.

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Question

What is the real answer for 0?

Donagan

Top Answerer

The value of 0! is defined as 1. The explanation for this is beyond the scope of this platform but can be found by searching online for "value of zero factorial".

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Question

How do I simplify n factorials?

Community Answer

If you don't want to use iterative multiplication, you can use Striling's approximation, which is: n! := sqrt(2πn)*(n/e)^n, where e = 2.71828.

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Question

How to find factorial of 120?

Donagan

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Do a websearch: "what is 120 factorial?" You will find it is approximately 6.69E198, which is 6.69 x 10^198.

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Question

Given that we have more than 2 or 3 factorials, say for example, 42! Times 36!, and the equation for that is too long, what do I do then?

Donagan

Top Answerer

Use any search engine to ask "what is 42 factorial?" You will find it is 1.4 x 10^51. Do the same for 36 factorial. It is 3.7 x 10^41. Then multiply those two values: (1.4 x 10^51)(3.7 x 10^41) = 5.18 x 10^92.

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