Thus age is a function of time. For you, we can write right now:
A = 21If the number of years that pass equals n, then for next year, n = 1 and
An = 21 + nSo,
A₀ = 21 + 0 = 21
A₁ = 21 + 1 = 22
A₂ = 21 + 2 = 23
A₃ = 21 + 3 = 24
What Are Factorials?Now there is nothing special about the letter A. It can be replaced by any other symbol the reader may choose. So let’s choose a new variable symbol, F. We choose to follow this symbol with, of all things, an exclamation point (!). We define this symbol to mean the mathematics operation factorial. What is a factorial?
Written F! it means a product of the form
F(F‒1)(F‒2)(F‒3)… until we reach the value 1.Thus, if F = 7,
F! = 7(7‒1)(7‒2)(7‒3)(7‒4)(7‒5)(7‒6) = 7(6)(5)(4)(3)(2)(1) = 5040
It’s Your Turn!Problem: Solve these factorials: F = 3, F = 5, F = 11. Write out the steps.
[Answers] 6; 120; 39,916,800If you were unable to solve the above problems, you may wish to watch this YouTube video on the topic. While there are other videos on the topic at that site, some of them have been made needlessly complex. It is better to learn a topic, than to be impressed by and kept ignorant of, the topic.
Note: You might also enjoy Mathematical Powers – A Simple Insight
References: ← Back to Math-Logic-Design