You are not logged in.
Pages: 1
TO break it down using words to describe
|A| = √<A|A>
So how would one describe or define the line between the two A's as written A|A... What does that line mean in math?
Alright, now I understand why it works...
My friend tried explaining it to me but in the reverse method as posted above... Thank you very much
Ok, so I know that divisibility 7 works. However I still don't understand why it works, and I would like to know why it works. if someone can explain it to me that would be wonderful.
Divisibility 7
Double the ones value and subtract it from the number remaining after omitting the ones digit. Repeat until you obtain a small difference. If it is divisible by 7 then it is.
EX. 301
Double the ones digit is 2. Subtract 2 from 30, which is the number formed by omitting the ones digit from the original number, yields 28. Because 28 is divisible by 7 the number 301 is divisible by 7.
YES IT WORKS BUT WHY!? Does anyone have a proof for this? or Just a way to explain why this works so well?
Ok, I understand where I went wrong... I kept forgetting to take in account that it is (n-4)! meaning that I was missing a step while computing it. Gosh, don't I fell smart.
come on people.. I'm confused
So, I'm going through my HW and I'm kind of stuck on a problem. I have no idea if I'm doing this right or not.
Q: If P(n, 4) = 360 find n
I got to P(n, 4) = n!/(n-4)! = 360
but I seriously have no Idea where to go from here... someone help please
ok... edit* second problem...
C (8, 6) = P(8, 6)/6! = 8!/ 6! (8-6)! = 8!/ 6!×2! = 20160/720 = 28
It would help alot if you could explain why each thing is as it is.
Edit* Never mind second problem, I messed up on the equation, I'm fixing it and posting the solution in this edit.
Ok, thanks that answers my question
I'm trying to solve a problem that requires me to find the smallest number that is x^n and x^y and x^z
In this particular case I'm trying to find a number that is #>2 but #<2 Trillion that is a perfect square, cube and fifth power. I know the answer to the problem however, I don't know how to explain one of my steps. I was wondering if you could help me out?
I know that the answer is 2^30 but how do I explain the 2?
Pages: 1