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EducationRe: Nairaland Interschool Debate. :::Planning Thread by jackpot(f): 11:11am On Jun 28, 2014
Miscellaneous: . . .it just became crystal clear the debate will be a tough one.
Thanks for your understanding.
I believe so too. When is the debate starting? wink
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 11:09am On Jun 28, 2014
How can we spend all those time preparing for the Mathematics quiz and all the efforts of the Quiz Masters and the participants go down the drain just like that? undecided
Christianity EtcRe: Nairaland Back From The Valley Of The Dry Bones! by jackpot(f): 11:05am On Jun 28, 2014
Where is the link to our hard-earned NMQC II Quiz?
SportsRe: Mikel To Be Flown To GLO/CAF Awards In Chelsea Jet by jackpot(f): 7:27pm On Jan 08, 2014
If you believe Mikel will win the prestigious APOTY award, hit LIKE!!! wink
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 10:31pm On Dec 30, 2013
^^. . .and the annoying thing is that the guy used Einstein in his username. SMH >'( sad >'(
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 1:36am On Dec 16, 2013
Humphrey77: .NICE , (:THE SEQUENCE IS A MULTIPLE OF 3 WE HAVE THE SEQUENCE AS 6,39,204,1024,5154,25779. ( RULE MULTIPLY 5 TO THE PREVIOUS TERM AND ADD 9 , TO GET THE NEXT TERM @ ,MADAM JACKPOT YOUR FORMULA DID NOT SATISFY THE RULE THAT GOVERNS THE SEQUENCE) :HAPPY
Story!!!

Remember when I told you earlier that there are many answers to this question?

What rule-satisfication are you talking about?

I hope you are not referring to the discombobulated crap of a hint you supposedly gave?

To the original question, my answer is on point.

Are you treasuring your answer? Oh well, I treasure my answer too as better.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 10:49pm On Dec 15, 2013
Humphrey77: MY QUEEN GAVE ME THIS QUESTION YESTERDAY AND AS ME TO COMPLETE IT : I said to my self what am i going to do ? told her that am going to post it to my oga on top : complete these : 6,__,204__,__,25779. (hint they are multiple of 3) : HAPPY
The formula for the nth term of your sequence may be given by

xn = (8426n2-33209n+24813)/5.

It is easy to verify that:
x1 = 6
x3= 204
x6=25779

and as such, we have

x2= - 7901/5
x4=26793/5
x5=69418/5

Use these numbers to fill in the gaps you gave. There you have it, bro.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 12:31pm On Dec 15, 2013
Laplacian: hey, i have more unanswered problems than any user on this thread , few in number theory though (as compared 2 elliptic functions)...here are two interestin ones, i've cracked d first one though, maybe u can generalise my result lik u did 4 alpha maximus, or mayb ur method of solution 'll get 2 b prettier than mine, in any case i'll get 2 learn smthin....subsequently, in all my questions, whenever i refer 2 integers, i mean NON-ZERO integers to avoid the supply of trivial solutions:

1.) find the set of all integer pairs (x, y) such that
x2+y2 is divisible by xy+1

2.) if
4n+2n+1 is a prime, show that n is some power of 3
ok. Nice questions grin grin grin
Humphrey77: find the missing number s; 5,_,1205,_271205,_ ok madam jackpot give me the solutions na
rest assured, I'll give you the solution before the day runs out. I am kinda busy now.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 12:22pm On Dec 15, 2013
Humphrey77: ok @ jack pot quickly give me the solution to
the problem within 5mins
bro, are you really interested in the solution or in speed?


Na exam be this? undecided shocked cheesy
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 1:22am On Dec 15, 2013
doubleDx: Wow, great bruv! Kudos man.... nice work!

@Alpha, I see you.... grin evil worded problem on rampage grin
Hi DoubleDx. How have you been?

I finally bought the Advanced Engine Maths by H.K.Dass @N1700. It's a nice read so far. His methods of solution are cool.

Thanks for recommending the text.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 1:16am On Dec 15, 2013
^I wouldnt crack my little brain on your question. I would rather leave that priviledge to you. cheesy

so dear, write your question as a mathematical equation. Then I will see whether it is solvable grin
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 10:57pm On Dec 14, 2013
Laplacian: for any confusion, refer 2 page 121
Clear.


Congrats on resolving your 3-yrs old question. See the power of sharing!!! cool

Any other enigmas for us to brainstorm on?
Jokes EtcRe: MTN Spam Messages by jackpot(f): 6:14pm On Dec 14, 2013
eddyvilla: Mine was when I checked my account balance and saw a msg that say: in honor of Mandela, text 95 to 4100 for Harrysong?s TRIBUTE TO MANDELA. Free for a month. To my greatest surprise MTN debited my account of 50 naira. What is NCC even doing in this country?
i got the message too. You were tricked. They gave a number that you will call. They even wrote subscription amount(I think it is 50/month) but they said the call is TOLLFREE.

They are logically correct, though dubious. What happened is that immediately you call, you were subscribed. But they didnt charge you for the number of seconds you spent on the call. Clear?


MTN is dubious. Hooooohaaaaaaaa!!!
Jokes EtcRe: MTN Spam Messages by jackpot(f): 6:07pm On Dec 14, 2013
I received 7 in the morning from them within 2 hours. So irritating.

I delete mine in the next second.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 5:46pm On Dec 14, 2013
Laplacian: ...i 'll assume this statement is not comin 4rm jackpot...i suggest the fool who has jackpot's phone should return it 2 her, because jackpot will not make such a futile comment,,,
Hahaha. I didnt know your first statement (the part where you replied Maximus) is still on the question. I thought you were boiling
another kettle of fish(answering another
question) with Maximus. I realised it after I'd
posted. I wanted to edit, but you've already replied.
Well, I see.

Don't you think the common difference should be -d (minus d)?
For example, for n=3, we have a=15, d=7.
I think it makes more sense if common
difference is -7.
The same thing goes for other choices of n.

It seems these equations are working. How did you come about them?
EducationRe: Nairaland Mathematics Clinic by jackpot(f):
I missed this part earlier. Thought it wasn't on the question I asked. sad
Laplacian: for any natural number n, the expression (2-√3)n can be expressed in the form
d+k√3....now d is the required common difference, the required first term, a=d-2k...
I thought you started replying me from here:
@jackpot...if there are infinite natural numbers, then there are infinite solutions
Can you kindly establish the link between the question you asked and the equation you gave above?

The equation you gave is working though.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 4:58pm On Dec 14, 2013
Laplacian: ;
yes
Pls, prove it then.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 4:19pm On Dec 14, 2013
Humphrey77: GIVEN THE sequence 5,_,1205,_,271205,_. find the missing numbers .
Easy one. . .

But there are many answers to this question sha.

how many do you need? I am serious.


NOTE
I know that the sequence is neither an AP or a GP.
EducationRe: Nairaland Mathematics Clinic by jackpot(f):
Alpha Maximus: ;DAlright, alright, alright! Thanks for the enlightenment. But I didn't say mine was the ONLY way though. Yours still works but mine is more attractive! cheesy cheesy
Attractive? Well, I would rather call mine sexier wink

REASONS WHY MINE IS SEXIER
Do you know that yours jumps/omits many Pythagorean triples? Few examples are: (5,12,13 ; 7,24,25; 8,15,17; 9,40,41; 11,60,61; 13,84,85; 15,112,113)

List of your Pythagorean triples are "smaller". cheesy

All the Pythagorean triples you can get from your formula are "proper subsets" of my formula Pythagorean triples.

None of your triples has a prime number in it.

From my Corollary, every odd number is part of some Pythagorean triple.

From my Propositions, every number n>3 is part of some Pythagorean triple.
Examples
3,4,5
6,8,10
7,24,25
8,15,17
9,40,41
11,60,61
12,35,37
14,48,50
16,63,65
18,80,82
19,180,181
20,99,101
21,220,221
. . .and so on.

Do you observe that I havent missed any natural number n>3?

Isn't that sexy? wink wink cool cool cheesy cheesy
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 3:04pm On Dec 14, 2013
Humphrey77: [ I disagree with the third sequence .( it not an AP) THE sequence 15, 112,127
I presumed he wanted to write 15, 112, 209.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 2:58pm On Dec 14, 2013
Alpha Maximus: Is there any correlation between such a triple and its successive/previous triple? Is there a general formula for obtaining such triples? Is there any correlation between the first, second and third terms of consecutive triples of this sort?
For example I discovered an easy way of producing Pythagorean Triples sometime ago, the formula is as follows and is sure-fire : 3n, 4n, 5n....where n is ANY number at all! It always works , try it! Assuming n=10, we'll have a Pythagorean triple of 30,40 and 50. Is this valid? Let's confirm.....302+402=502
900+1600=2500
2500=2500 ....thus , the validity has been authenticated . 'N' can even be a decimal to 13 decimal places and it would still work. Laplacian, do you have any formula of this sort to obtain your cited triples in which the sum of one and the product of any two numbers in such a triple will result in the yield of a perfect square? grin
that one na baby formula na. A "very obvious" one grin

Lemme share another Pythagorean formula which I have observed for you:

Proposition
Let k be any number at all. Then, the numbers:
k2-1, 2k and k2+1
are Pythagorean triples.

Proof
It follows from the application of the pythagorean theorem. QED.

Application
For k=2. . . . . . .3, 4, 5
k=3. . . . . . . 8, 6, 10
k=4. . . . . . . 15, 8, 17
k=5. . . . . . . 24, 10, 26
k=6. . . . . . . 35, 12, 37
k=7. . . . . . . 48, 14, 50.


Here is another one which I deduced from the above:

Corollary
Let k be an odd number. Then the numbers:
1/2(k2-1), k, 1/2(k2+1)
are Pythagorean triples.

Application
k=3. . . . . . . .4, 3, 5
k=5. . . . . . . .12, 5, 13
k=7. . . . . . . .24, 7, 25
k=9. . . . . . . .40, 9, 41

Propositions (jackpot 2013) grin
The following are pythagorean triples:
k^2-1, 2k, k^2+1
k^2-4, 4k, k^2+4
k^2-9, 6k, k^2+9
k^2-16, 8k, k^2+16

generally,
k^2-m^2, 2m, k^2+m^2

where 1<m<k and both k,m€ lN.


Other deductions are possible(think along the line the Corollary stated).


Gracias.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 2:57pm On Dec 14, 2013
Alpha Maximus: Is there any correlation between such a triple and its successive/previous triple? Is there a general formula for obtaining such triples? Is there any correlation between the first, second and third terms of consecutive triples of this sort?
For example I discovered an easy way of producing Pythagorean Triples sometime ago, the formula is as follows and is sure-fire : 3n, 4n, 5n....where n is ANY number at all! It always works , try it! Assuming n=10, we'll have a Pythagorean triple of 30,40 and 50. Is this valid? Let's confirm.....302+402=502
900+1600=2500
2500=2500 ....thus , the validity has been authenticated . 'N' can even be a decimal to 13 decimal places and it would still work. Laplacian, do you have any formula of this sort to obtain your cited triples in which the sum of one and the product of any two numbers in such a triple will result in the yield of a perfect square? grin
that one na baby formula na. A "very obvious" one grin

Lemme share another Pythagorean formula which I have observed for you:

Proposition
Let k be any number at all. Then, the numbers:
k2-1, 2k and k2+1
are Pythagorean triples.

Proof
It follows from the application of the pythagorean theorem. QED.

Application
For k=2. . . . . . .3, 4, 5
k=3. . . . . . . 8, 6, 10
k=4. . . . . . . 15, 8, 17
k=5. . . . . . . 24, 10, 26
k=6. . . . . . . 35, 12, 37
k=7. . . . . . . 48, 14, 50.


Here is another one which I deduced from the above:

Corollary
Let k be an odd number. Then the numbers:
1/2(k2-1), k, 1/2(k2+1)
are Pythagorean triples.

Application
k=3. . . . . . . .4, 3, 5
k=5. . . . . . . .12, 5, 13
k=7. . . . . . . .24, 7, 25
k=9. . . . . . . .40, 9, 41

Propositions (jackpot 2013) grin
The following are pythagorean triples:
k^2-1, 2k, k^2+1
k^2-4, 4k, k^2+4
k^2-9, 6k, k^2+9
k^2-16, 8k, k^2+16

generally,
k^2-m^2, 2m, k^2+m^2

where 1<m<k and both k,m€ lN.


Other deductions are possible(think along the line of the Corollary I stated).


Gracias.
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 2:19pm On Dec 14, 2013
Laplacian: ...integers which satisfy my question in increasing order of the magnitude of their first term include;
1, 8, 15
4, 30, 56
15, 112, 127
56, 418, 780
2911, 21728, 40545
...infinitely more...
You said infinitely more? Can you prove it?
Rap BattlesRe: Nairaland King Tournament : Semi Finals by jackpot(f): 2:07pm On Dec 14, 2013
^You think I'm cooking it up?

Just check out your signature:

"My mindset
Is to take away sanity from humanity
And
replace it with madness!!"


You see? Lolz.





You know why I would neva marry you if I were your girl-friend? It is because what most of you does is to call their girlfriends "beaches" in their rap songs. Your grandfather Tupac is one of them grin

Another reason is that I dont want anybody going to the studio the next day and rapping about how we made love the previous night. cheesy cheesy cheesy

I jump am pass grin grin grin
Rap BattlesRe: Nairaland King Tournament : Semi Finals by jackpot(f): 7:51am On Dec 14, 2013
яhymΣ_ ȴunα†!¢:
Must you insult?
No be una pastime? Everytime you people prepare bars, na to look for rhyming diss una dey do. I neva see anyone of you praising each other in your flows grin grin

No wonder most of you guys "diss everywhere you go." Lolz grin

you even have the word "Lunatic" in your username. This is a proof that "dissing" and "derogatory words grin " are always on your subconscious minds.

I know what most of you does is walking up a street and the next thing is unconsciously dropping some diss flows and probably a passerby might think that you have gone bonkers. Hahahaha, I am sorry for you ooooooo grin



one love, my brothers kiss kiss
Rap BattlesRe: Nairaland King Tournament : Semi Finals by jackpot(f): 7:21am On Dec 14, 2013
^you already dissing potential judges, bro. You want make we vote you commot?


Lolz @ Vampires and Cowards grin grin grin
EducationRe: Nairaland Mathematics Clinic by jackpot(f):
@Laplacian

abeg, na TaE method I used. grin

Anyways, I started the hunt by simplifying my choice for the first term, so I set a=1.

Next, I looked for the closest square: 4. I choose 3 as the second term so that 1(3)+1=4.
But the third term 5 didnt work since 1(5)+1=6, even though 3(5)+1=16.

So, I began shopping for the next closer square: 9. I then re-choose 8 as my second term so that 1(cool+1=9. Now, the third term is 15. 1(15)+1=16. 8(15)+1=121. Purrrrrrrrfect! cool cool cool

Took 2 mins though, but I know that my next search for the next triple may take hours. wink grin Maybe am lucky with these triples 1, 8, 15. cheesy

Simplifying my choice for a by setting "a=1" helped a lot since it tells you that the possible second term has to be "perfect square minus 1" for obvious reasons.

disclaimer: "a" can be any integer apart from 1 though. Using TaE method, it is good to fix the first term since the possible second terms comes handy. The third term is the "make or mar" term. For example in 1,3,5, the term 5 marred it since 1(5)+1 is not a perfect square.


Next, it is interesting to note that any three consecutive even/odd numbers(except 0,2,4) nearly satisfies it. This is an indirect consequence of difference of two squares. Maybe this "nearly" property triggered your research?

Proposition
No three consecutive even/odd numbers satisfies Laplacian's question grin grin grin

Proof
Let a be an integer and common difference d=2.
Then the three consecutive even/odd numbers are
a, a + 2, a +4

Now,
a(a+2)+1=a2+2a+1=(a+1)2,
which is a perfect square.
(a+2)(a+4)+1=a2+6a+9=(a+3)2,
again, a perfect square.
[s]two pefect squares already. grin No wonder the "nearly satisfication" claim[/s]

But,
a(a+4)+1=a2+4a+1=(a+2)2-3,
which is not, in general, a perfect square, except if (a+2)2=4, in which case a=0, a+2=2, a+4=4 (or a=-4, a+2=-2, a+4=0). No wonder 0, 2, 4 and -4, -2, 0 are nice brides wink grin

The proof is complete. cheesy










Lemme stop here. grin grin grin
EducationRe: Nairaland Mathematics Clinic by jackpot(f):
Laplacian: thanks ma'am...but only non-zero integers are allowed
okaay, Sir Laps.

There you go:

1, 8, 15.

-1, -8, -15.

Need more?
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 12:47am On Dec 13, 2013
Laplacian: ...pls i need help with this questoin...either a solution or an idea is welcome...

Three non-zero integers are in arithmetic progression, the product of ANY two when when increased by one is a perfect square...find the numbers......
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 12:46am On Dec 13, 2013
Laplacian: ...pls i need help with this questoin...either a solution or an idea is welcome...

Three non-zero integers are in arithmetic progression, the product of ANY two when when increased by one is a perfect square...find the numbers......
Hi Mr Laps, the numbers are 0, 2, 4. cool
RomanceRe: ~Welcome To The Romance Section (New Members Introduce Yourselves)~ by jackpot(f): 5:14am On Dec 12, 2013
Commenting on threads started by "Nobodies" is kinda awkward and insulting on our sensibilities. Mods and Seun, please do something about that. Thanks!!!
EducationRe: Nairaland Mathematics Clinic by jackpot(f): 5:11am On Dec 12, 2013
Calculusf(x):
.i respect you bro,but here is my approach...y=x^x^x...y=x^(x^2).try this with calculator and substitute values like 2 and 3 and check if it's correct...for 2...x^x^x=16 and x^(x^2)=16 try that of 3 also...and y=x^x^x means...y={[(x)^x]^x} and from indices u=(x^a)^b=x^ab...then y=x^(x.x)=x^(x^2)...so from the question y=x^x^x...taken natural log of both sides...lny=ln.x^x^x...lny=xlnx^x...(lnx^x=xlnx)then lny=x.xlnx...lny=x^2lnx...1/y.dy/dx=x+2xlnx...dy/dx=x^x^x{x+2xlnx}
Hi bro Calculusf(x), sorry, I have to disagree with you here.

x^x^x is not equal to (x^x)^x, but rather x^(x^x).

I am sorry if you haven't looked at it this way.

Please, look for your dy/dx again. Cheers!

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