₦airaland Forum

Good Morning Nigeria,

It's another promising week. Wishing you all a great day at work.

And to the expectant, a new story is about to told.


Peace,

#GodBlessNigeria

Madmathecian:
Find the distance from the point (2,3) to the line containing the points (−2,−1) and (5,4).

Do you mean the shortest distance?

If yes then:
The shortest distance to a point is across a perpendicular line to the line towards the point.
#1 - Equation of the line perpendicular to the line is calculated
#2 - Point of intersection of the lines is found
#3 - Distance between the point of intersection of the lines and the point (2,3) gives answer

#1
(y-4)/(x-5) = (4--1)/(5--2)

y-4 = 5/7(x-5)

7y = 5x + 3

m= 5/7
-1/m = -7/5

(y-3)/(x-2) = -7/5

y-3 = -7/5(x-2)

5y = -7x+29

#2

#SleepyMe

... To be continued


#GodBlessNigeria

Op @naijainfogalery
[size=16pt]
I dig[/size]

Salud mi Familia


#GodBlessNigeria

labodinho:
Hello house,please check this out.

1.If we are to select two out of 4 boys and 5 girls,how many of them will be girls?

2.If 6 letters are arranged in 6 different enveloped,what is the probability of picking a particular letter?

1.If we are to select two out of 4 boys and 5 girls, how many of them will be girls?

Invalid question. Number of girls is either 0, 1 or 2


2.
Answer = 1/6

okzcorp:
A Blissful year to you all.

Make una forgive me, as I got married, i had divided attention.

Happy married life. Wishing all the best things marriage's got to offer.


Ciao,

#GodBlessNigeria

AskProf:
product is certainly DisplayPort Male to HDMI Female adapter... Also available are 1. DisplayPort Male to Di7playPort Female... 2. DisplayPort Male to HDMI M ale cables.

OK bro.
The male-to-male cable is ok. I saw on your post that it's 5k abeg what's the last price?
If you know any Osogbo park, you can send it through the park. I think that'll cost between 500 - 1k.

yorex2011:
Lolz.. Seemed like people were not interested... Afterall it ain't a romantic thread .. I'd try to complete it sha.. At least let it be there for anybody that might need it

Go and complete the thread before I lose interest. Arrrghh

You sef dey for Shell matter? Na wa o. Everybody want chop oyel money.


Good Night Nigeria

#GodBlessNigeria

yorex2011:
Mental maths 5

Nice thread. Keep it coming

DatechMan:
Ok bro.
Let's leave out the charger.
I want to add this to the order instead.
http://www.ebay.com/itm/2X-Wireless-Gamepad-Controller-Joystick-USB-Receiver-for-PC-Gamer-UK-Grey/351500023005

What's the total cost and Naira equivalent so that I can sort things out quickly.

Salud,

#GodBlessNigeria

Oga mikky still awaiting your response

Madmathecian:
How many digits does 3⁵⁰⁰⁰ have?

The answer should be:

5000log3

which is 2385.60627...

Since there can only be whole digits(always round up), the answer is 2386

Explanation:

3⁵⁰⁰⁰ == k x 10ⁿ

where n represent the number of digits if 0.1< k < 1

finding log of both sides and simplifying:

5000log3 = logk + nlog10

n = 5000log3 - logk

since logk is inconsequential since logk <<< 5000log3, we can ignore first.

n = 5000log3
n = 2385.60627...

Note that -1 lessorequal logk lessorequal 0

Therefore we can only round up our answer

n = 2386


Also, by extension:

logk = 5000log3 - 2386

k = 10^{(5000log3 - 2386)}
k = 0.40389976...

It follows that 3⁵⁰⁰⁰ = 0.4039 x 10²³⁸⁶


Good Morning Nigeria

#GodBlessNigeria

ProudOlodo:
Okay na...who wouldn't want an august visitation, they always come with a "love letter". Pls I like my letters in purple envelopes I'll be looking forward to it. My hosting address? Shouldn't be a nut for "da tech man"

amicable09:
I can't wait to host you Datech! But you'll have to permit me to snoop a little and catch a glimpse into your itinerary for the month so I can plan mine, having you in mind.

Lero15:
Hehe. Soon.

ksstroud:

Let the seeing begin....

Thanks guys.

@ProudOlodo. Love letter? Don't worry. I'll sure serve you a glamour

@amicable09. I don't mind you snooping a lil bit.

Can I safely assume all of you are in SW? Who knows. Maybe just maybe I can achieve the feat. Kindly signify your state and town of residence so that I can map out the route.


Good night Fellas

#GodBlessNigeria

amicable09:
OP, have you tried wireless connection? Maybe the visual stuff also needs an audio reception for its functional modalities to be in touch... lol.
Let's wait for the next poster, he'll have a better idea.

LMAO

ProudOlodo:
I am a baby in programming and have been trying some few codes in VB 6.0 for a while. I recently got Visual Studio 2008 from a friend and loved it.
So I decided to replicate a small program I once toyed with in VB6...a client-server connection. I achieved it in VB6 using the winsock control but it seems the feature has been discontinued in VB.NET.
I know there would be a way to achieve the same function in Visual Studio 2008 but I have no idea how.
Please I need the help of programmers in the house. Thank you

Check the .Net framework library documentation to learn about new libraries and classes. Most of the legacy Win32 classes have been deprecated.
You can use the offline documentation or the online MSDN.

I used to program C#.Net. Since VB.Net is also built on the same framework/libraries. Check out this class   System.Net.Sockets.Socket https://msdn.microsoft.com/en-us/library/system.net.sockets.socket%28v=vs.110%29.aspx Try to check examples for VB

It's been a while I've used Visual Studio but I think on the windows form tool box there is a socket tool. This is the only GUI based way to quickly provision a connection. I might be wrong though.

Even if you have to hand-code it (Something VB programmer won't love) it's fairly simple if you read through the documentation and examples.


Ciao,

#GodBlessNigeria

beau49:
Lero15 and Eipreel....eku seeing o Happy Sunday ma people!!!!

When will I start seeeeeing my Nairaland e-brothers and sisters? This is 2016, let me start adjusting my calendar. I will start from amicable09 to Lero15 to ProudOlodo (I know you're not nearly as dull as your name implies) to ksstroud and then to my ogas Jarus and davide470.

PA, kindly take note. This year go gidi gan.

If you are interested in hosting a VIP, you'd better signify now. You might be the lucky winner of my august visitation.

Ciao,

#GodBlessNigeria

onoxyx:
Any person(s)with OND/HND in elect/mechanical engineering interested in working with a mechanical and electrical services firm should please send CV to onoxyx@Yahoo.com. we also have spaces for those looking for internship. Thanks!

NB. Those with Bsc can also apply.

What about HND Computer Science? I have someone with that qualification. Can he still apply?

In other news;
Where is the firm located?
What is the welfare package like?
And I hope the company has a name.


I would be glad to hear your response ASAP.

Regards,

#GodBlessNigeria

mikkyangel:
I HAVE ORIGINAL HP CHARGER ATOregun for #2500naira(used)

-will ship battery for $12
-the other item for free

Ok bro.
Let's leave out the charger.
I want to add this to the order instead.
http://www.ebay.com/itm/2X-Wireless-Gamepad-Controller-Joystick-USB-Receiver-for-PC-Gamer-UK-Grey/351500023005

What's the total cost and Naira equivalent so that I can sort things out quickly.

Salud,

#GodBlessNigeria

AskProf:
Availiable, call 0808.two.nine.three.2020.

What I see in that picture is a HDMI to Mini-HDMI converter like the type used for phones.


What I need is a converter with DisplayPort male port with an inscription like the pic used in my early comment and a Female HDMI port.

Note that DisplayPort is a multimedia port like HDMI but usually used on enterprise PC like the HP Elitebook. Although the form factor is similar they are truly distinct.

Dear martinz1

The laptop I'm using is HP Elitebook 8440p.

The displayport male side should have this logo

martinz1:
See the one I have. I don't know if its d same

Yes. It looks something like that. Though I can't distinguish the port clearly in the picture because HDMI is very similar to DisplayPort in terms of connector/port.

Kindly verify that there is a mark that looks like D on the male connector.

Bro, where are you based?

Why do we have this on front page?

Oga mikololo,

How much to land these items?

http://www.ebay.com/itm/Genuine-62WH-HP-EliteBook-8440W-8440P-6930P-Compaq-6735b-6730b-6535b-battery-/131622082352?hash=item1ea5499730:g:-ZUAAOSw0HVWFSwY

http://www.ebay.com/itm/Genuine-Original-19V-4-74A-90W-AC-DC-Adapter-Charger-HP-EliteBook-8440p-8440w-/120795722322?hash=item1c1ffc7252:g:2iQAAMXQVs1RlYpH

http://www.ebay.com/itm/DisplayPort-DP-Male-to-HDMI-Female-Adapter-Cable-Converter-for-Dell-HP-Lenovo-/121817019027?hash=item1c5cdc3293:g:1yMAAOSwqv9V7S-O

How much to land these items?

http://www.ebay.com/itm/Genuine-62WH-HP-EliteBook-8440W-8440P-6930P-Compaq-6735b-6730b-6535b-battery-/131622082352?hash=item1ea5499730:g:-ZUAAOSw0HVWFSwY

http://www.ebay.com/itm/Genuine-Original-19V-4-74A-90W-AC-DC-Adapter-Charger-HP-EliteBook-8440p-8440w-/120795722322?hash=item1c1ffc7252:g:2iQAAMXQVs1RlYpH

http://www.ebay.com/itm/DisplayPort-DP-Male-to-HDMI-Female-Adapter-Cable-Converter-for-Dell-HP-Lenovo-/121817019027?hash=item1c5cdc3293:g:1yMAAOSwqv9V7S-O

HAPPY NEW YEAR

Sirneij:
1. Use the principle of mathematical induction to show that the arithmetic mean is always greater than or equal to the geometric mean.
2. Prove that (3 + square root5)ⁿ + (3 - square root5)ⁿ is an even integer for all natural numbers n using the principle of mathematical Induction.
3. Use the principle of Mathematical Induction to Prove that 2002^{n +2} + 2003^{2n + 1} is divisible by 4005.
4. Prove by Mathematical Induction that ¹/₂ + cosx + . . . + cos(n - 1)x = ^{sinx/2(2n - 1)}/_2sinx/2

I must mention that some of this your questions, especially 1 - 3 need not be proved using Mathematical inductions because they are self sufficient.
Meanwhile check out agentofchange1 solutions. Ask questions if you are not clear


Q1
Agent of Change has tried to adapt the proof to Mathematical Induction.


Full proofs here. Check it out

http://www.artofproblemsolving.com/wiki/index.php?title=Proofs_of_AM-GM


Q2
agentofchange1 can you tell us why you think it is you have sufficiently proved the expression when the terms in the bracket cannot be said to be integers or Rational number to say the least.
Kindly expatiate. Because 2y is always even if only y is a non-zero integer.

Thanks

afobam:
is there any method apart from using graph

This is a classical example of limitations of analytical methods.
Note: Not all problems are solvable analytically or say easily solvable.

Bro, you need to solve that question using either Graphical method or Numerical methods.

The solution is quite trivial, graphically.

f(x) = 5^x - 4^x - 3^x

Here is an online plotter. http://rechneronline.de/function-graphs/


HAPPY NEW YEAR

#GodBlessNigeria

Happy New Year.
I cannot but appreciate every Joblander. The Job/Vacancies section of Nairaland has evolved to a community of its own. You guys have been more than friend, you have been family. You have lend support in those dire times. The camaraderie and fellowship on here would be undervalued if not equated with kinship and family ties. You guys have been wonderful. I have gained on here more than I even realise.
For those of us that are committed to sharing of information and career development of Nigerian youths, I salute your unflinching doggedness and commitment to the cause. May all the good things of life be yours.
2016 shall be the year of testimony for all of us.
There are innumerable joblanders that have made 2015 a wonderful one for me. Mentioning them here would be an impossible task on its own. Nevertheless I would take the pain to mention these few people for the opportunity given to Nigerians via this forum.
Seun, lalasticlala, davide470 and my oga, Jarus.

Meanwhile I appreciate You. I mean You, yes You that you are reading this.


Lots of Love from your one and only Datechman.

Salud mi Familia

HAPPY NEW YEAR

#GodBlessNigeria

Mr Balogun,

How much to land these items to IB?

http://www.ebay.com/itm/Genuine-62WH-HP-EliteBook-8440W-8440P-6930P-Compaq-6735b-6730b-6535b-battery-/131622082352?hash=item1ea5499730:g:-ZUAAOSw0HVWFSwY

http://www.ebay.com/itm/Genuine-Original-19V-4-74A-90W-AC-DC-Adapter-Charger-HP-EliteBook-8440p-8440w-/120795722322?hash=item1c1ffc7252:g:2iQAAMXQVs1RlYpH

http://www.ebay.com/itm/DisplayPort-DP-Male-to-HDMI-Female-Adapter-Cable-Converter-for-Dell-HP-Lenovo-/121817019027?hash=item1c5cdc3293:g:1yMAAOSwqv9V7S-O

Why do you want to sell?
I have batteries. Can you sell just the inverter?
I'm based in Osun state. You?


#GodBlessNigeria

Good day Nairalanders,
I need to connect my HP Elitebook 8440p with my new Samsung 4K TV.
The problem here is that the laptop comes with only a single DisplayPort with no HMDI port. My TV supports an array of 4 HDMI ports but no DisplayPort connection.

I'm in need of a DisplayPort to HDMI adapter. Something like

http://www.ebay.com/itm/Display-Port-DP-Male-To-HDMI-Female-Adapter-Converter-Adaptor-for-HDTV-PC-FE-NEW-/141860921779?hash=item210791e1b3:g:skgAAOSwCQNWfgjK

OR

https://www./universal-display-port-to-hdmi-cable-1150473.html


Thanks in advance.

#GodBlessNigeria

Sirneij:
1. Use the principle of mathematical induction to show that the arithmetic mean is always greater than or equal to the geometric mean.
2. Prove that (3 + square root5)ⁿ + (3 - square root5)ⁿ is an even integer for all natural numbers n using the principle of mathematical Induction.
3. Use the principle of Mathematical Induction to Prove that 2002^{n +2} + 2003^{2n + 1} is divisible by 4005.
4. Prove by Mathematical Induction that ¹/₂ + cosx + . . . + cos(n - 1)x = ^{sinx/2(2n - 1)}/_2sinx/2

Kindly write the questions on a paper and snap. The trig question is not clear

Sirneij:
No one to address these?
c DatechMan
cc Richiez

Been busy lately.

I will try to crush those questions soonest
أ

#GodBlessNigeria

Sirneij:
1. Use the principle of mathematical induction to show that ¹/ _{(4 x 1² - 1)} + ¹ / _{(4 x 2² - 1)} +...+ ¹/_{(4n² - 1)} = ⁿ/_{(2n +1)}.
2. Prove by mathematical induction that 1 x 2⁰ + 2 x 2¹ + 3 x 2² +...+ n x 2^n-1 = 1 + (n - 1)2ⁿ.

Question 1
Confirm for n=1 Valid
confirm for n =2 Valid

Assuming for n, ¹/_{(4 x 1² - 1)} + ¹/_{(4 x 2² - 1)} +...+ ¹/_{(4n² - 1)} = ⁿ/_{(2n +1)}

We test for n+1
It follows that

ⁿ / _{(2n +1)} + ¹/_{(4(n+1)² - 1)} must equal ⁽ⁿ⁺¹⁾/_{(2(n+1) +1)}

i.e

ⁿ / _{(2n +1)} + ¹/_{(4(n+1)² - 1)} = ⁽ⁿ⁺¹⁾/_{(2(n+1) +1)}

Simplifying RHS, we have

^{(n + 1)} / _{(2n + 3)}

Simplifying LHS, we have

ⁿ / _{(2n +1)} + ¹/_{(4n² + 8n + 4 - 1)}

ⁿ / _{(2n +1)} + ¹/_{(4n² + 8n + 3)}

ⁿ / _{(2n +1)} + ¹/_{(2n + 1)(2n + 3)}

^{(n(2n+3) + 1)}/_{(2n + 1)(2n + 3)}

^{(2n^2 + 3n + 1)} / _{(2n + 1)(2n + 3)}

^{(2n +1)(n + 1)} / _{(2n + 1)(2n + 3)}

^{(n + 1)} / _{(2n + 3)}

Since LHS = RHS

Proved.


Not easy to type equations here o.

Eat it like that.

Good Morning Nigeria.
#GodBlessNigeria