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Nairaland Mathematics Clinic - Education (6) - Nairaland

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Re: Nairaland Mathematics Clinic by chikis(m): 1:00pm On Jan 03, 2013
Adol16: Maths gurus pls help me solve the simultaneous equations

x + y =5
x^x + y^y=31
You call this a simultaneous equations? What sort of simultaneous equations is this?

1 Like

Re: Nairaland Mathematics Clinic by Tolzeal(m): 1:04pm On Jan 03, 2013
chikis:
Lie lie mathmatician, wetin carry log enter the equation?
No come put anybody inside bottle.
You think say na only you do mathmatics?
why kant we introduce log! U funi no be smal,u must b a learna?

1 Like

Re: Nairaland Mathematics Clinic by Tolzeal(m): 1:05pm On Jan 03, 2013
chikis:
You call this a simultaneous equations? What sort of simultaneous equations is this?
thats y u av to learn Everyday!
Re: Nairaland Mathematics Clinic by Mathano(m): 1:08pm On Jan 03, 2013
At chikis,It is a simultaneous equ.It is called one linear,one quadratic simultaneous equ

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Re: Nairaland Mathematics Clinic by wonlasewonimi: 1:12pm On Jan 03, 2013
Richiez: This thread is the meeting point for nairaland maths gurus...i dare you all to ask me a question in mathematics without me having an answer to them, LETS START

What is 2+2 (no calculator)
Re: Nairaland Mathematics Clinic by biolabee(m): 1:14pm On Jan 03, 2013
Can any mathematician here solve this simple question:

You are about to play a dice game where you are paid 5 naira each time you roll an odd number. You are allowed to roll the dice five times. A friend tells you that the die used is biased such that even numbers are twice as likely to appear as odd numbers. Based on this information, what is the maximum amount you would pay to play this game?

Interesting question but Id like to clarify your last statement
How much you be paid or how much you will pay

P(an odd number) = 1/9 based on the even number bias being double (1 + 2+ 1 + 2+ 1+ 2 =9 )
P(rolling 5 odds straight) = (1/9^5)
Expected value = 5^5 = 3125 which is the best u can get

However there are combinations which mean u can get sth for less than 5 odd nos
Which will be the probability of 1 less all even numbers

I leave it for more clarifications
As the probs are endless and the expected value minute

1 Like

Re: Nairaland Mathematics Clinic by 1stknight(m): 1:15pm On Jan 03, 2013
dabrake:
that's something about mathematics. I believe people say 0/0 = undefined because it can give you any value. Take for instance.

0/0 = (81 - 81)/(81 - 81) //81-81=0
=[(9 + 9)(9 - 9)]/9(9 -9) // 81 - 81 = 92 - 92(law of difference of 2 squares)
=(9 + 9)(9 - 9)/9(9 -9)
=(9 + 9)/9
= 2

now saying 0/0 = 12
0/0 = (144-144)/(24-24) // 144-144 =0 ; 24-24 =0
= (122-122)/2(12-12)
= (12+12)(12-12)/2(12-12)
= (12+12)/2
= 12


You see, you can always get any answer. Deceptive subject

Brother mathematics is not deceptive, because you can't get any constant value for a particular real number i.e a/b is what makes it UNDEFINED. Unlike 2/4=1/2, 0/0=undefined.
Re: Nairaland Mathematics Clinic by dabrake(m): 1:15pm On Jan 03, 2013
@op, prove that 6 + 5 + 3 = 20
Re: Nairaland Mathematics Clinic by 1stknight(m): 1:24pm On Jan 03, 2013
Tolzeal: u the bos man...can u solve dz, prove that 2>n=n for al positv in integax

Please check the question again, I think it is proof that 2^n>n
Re: Nairaland Mathematics Clinic by Truman155(m): 1:25pm On Jan 03, 2013
If a+b+c=8, a^2+b^2+c^2=16 and a^3+ b^3+c^3=64 find a,b, and c.
Re: Nairaland Mathematics Clinic by journerman(m): 1:26pm On Jan 03, 2013
Nice one here. Would be back
Re: Nairaland Mathematics Clinic by kosebinu(m): 1:28pm On Jan 03, 2013
Richiez: This thread is the meeting point for nairaland maths gurus...i dare you all to ask me a question in mathematics without me having an answer to them, LETS START
like yorubas will say '' agba to ba ni Omi ninu, does not always make sound''. I think u know wat it takes for someone to becom a mathematician cos BSc in maths does not makes u a mathematician ooo. But if u think u know everytin in mathematics, i kosebinu can challenge u cos nobody knows it all. Check d profile of all d mathematicians u knw, u will understand wat am saying.

1 Like

Re: Nairaland Mathematics Clinic by Truman155(m): 1:43pm On Jan 03, 2013
dabrake: @op, prove that 6 + 5 + 3 = 20
6base7+5base7+3base7=20 so 6+5+3=20 provided the LHS is in base7
Re: Nairaland Mathematics Clinic by ueskman(m): 1:45pm On Jan 03, 2013
hi, to favour more of us, we cn mk use of this site
*www.purplemaths.com*
feel free...

1 Like

Re: Nairaland Mathematics Clinic by BrutusOj(m): 1:47pm On Jan 03, 2013
Waoo..nice tread.my gurus in d house,kindly make t d subject of d formular in d expresion below" s=ut+1/2at^2" I.e d second equation of motion(s=ut+half atsquare).am waitin
Re: Nairaland Mathematics Clinic by dabrake(m): 1:50pm On Jan 03, 2013
Truman155: 6base7+5base7+3base7=20 so 6+5+3=20 provided the LHS is in base7
you're right.
Re: Nairaland Mathematics Clinic by 1stknight(m): 1:51pm On Jan 03, 2013
BrutusOj: Waoo..nice tread.my gurus in d house,kindly make t d subject of d formular in d expresion below" s=ut+1/2at^2" I.e d second equation of motion(s=ut+half atsquare).am waitin

Completing the square method, that 's what you 'll use

1 Like

Re: Nairaland Mathematics Clinic by 1stknight(m): 1:53pm On Jan 03, 2013
Truman155: If a+b+c=8, a^2+b^2+c^2=16 and a^3+ b^3+c^3=64 find a,b, and c.

Omo this your maths thick I must admit
Re: Nairaland Mathematics Clinic by chikis(m): 1:55pm On Jan 03, 2013
Richiez: This thread is the meeting point for nairaland maths gurus...i dare you all to ask me a question in mathematics without me having an answer to them, LETS START

Father reduced the
quantity of food
bought for the
family by 10%
when he found
that the cost of
living had increased
by 15%. Thus the
fractional increase
in the family food
bill now is what?

Solve it, maths guru!

1 Like

Re: Nairaland Mathematics Clinic by dabrake(m): 1:57pm On Jan 03, 2013
kosebinu:
like yorubas will say '' agba to ba ni Omi ninu, does not always make sound''. I think u know wat it takes for someone to becom a mathematician cos BSc in maths does not makes u a mathematician ooo. But if u think u know everytin in mathematics, i kosebinu can challenge u cos nobody knows it all. Check d profile of all d mathematicians u knw, u will understand wat am saying.
there's no iota of lie in what you've posted though that doesn't mean we will ask the op some z transforms, fourier series, power series or any time consuming question from any of mathematics numerous topics. Just 'play' it. Enjoy.
Re: Nairaland Mathematics Clinic by Krucifax(m): 2:05pm On Jan 03, 2013
BrutusOj: Waoo..nice tread.my gurus in d house,kindly make t d subject of d formular in d expresion below" s=ut+1/2at^2" I.e d second equation of motion(s=ut+half atsquare).am waitin



s=ut+0.5(a)t^2,s=t(u+0.5at),t=s/(u+0.5at),t^2=s/(U+0.5a), therefore t= sqrt of (s/(U+0.5a))
Re: Nairaland Mathematics Clinic by Krucifax(m): 2:16pm On Jan 03, 2013
chikis:

Father reduced the
quantity of food
bought
for the
family by 10%
when he found
that the cost of
living
had increased
by 15%. Thus the
fractional increase
in the family food
bill now is what?

Solve it, maths guru!

The highlighted above seems a paradox( my opinion o no vex)

Please rephrase this question you haven't asked it properly. (Family food = X,Living cost = Y) Therefore IF X -10% & Y + 15% Find fractional increase =

1 Like

Re: Nairaland Mathematics Clinic by Mathano(m): 2:24pm On Jan 03, 2013
My questn about d proof on integraldomain and fields is yet to be answered
Re: Nairaland Mathematics Clinic by Nobody: 2:24pm On Jan 03, 2013
Thumbs up guys for the good job. I studied pure maths in unilag and I must say that my life has been the better for it. For all those who have the passion for maths I encourage you to study it in school and learn to make your passion work for you. Maths forms the base of all science and engineering courses so it's very easy to convert to other professions. A lot of my colleagues work in banks, audit firms, marketing firms, oil and gas, telecoms, food and beverages etc

I remember in 300 and final year I rarely used my calculator cos most of the courses we did were theoretical and used more of x, y and z rather than numbers. Then I was so sure Prof Olaleru was making up some of the stuff he taught us. So you can imagine how surprised I was to find all those pure maths principles embedded in stuff I do at work.

What am just trying to tell you all who want to know if it's worth their time to study maths or stats the answer is yes, especially if your a natural guru. All the maths gurus in my class spent more time playing games than reading, in maths once u know it you know it and unless your ecturer na witch, there is no way he wants to set his questions that u will not answer it and get method mark. grin

8 Likes

Re: Nairaland Mathematics Clinic by Mathano(m): 2:27pm On Jan 03, 2013
Mathano: My questn about d proof on integraldomain and fields is yet to be answered
Re: Nairaland Mathematics Clinic by Truman155(m): 2:27pm On Jan 03, 2013
Krucifax:



s=ut+0.5(a)t^2,s=t(u+0.5at),t=s/(u+0.5at),t^2=s/(U+0.5a), therefore t= sqrt of (s/(U+0.5a))



sir if u have t=sqrt of (s)/(u+0.5a) and u wanna make s the subject of the formular u wont get thd eqn of motion y

1 Like

Re: Nairaland Mathematics Clinic by Tolzeal(m): 2:32pm On Jan 03, 2013
BrutusOj: Waoo..nice tread.my gurus in d house,kindly make t d subject of d formular in d expresion below" s=ut+1/2at^2" I.e d second equation of motion(s=ut+half atsquare).am waitin
Thatx the solun at ma picx..jus us what popular kald almyty 4mula..andu gewd to go..i wil pwt ma fnal anx sn..

1 Like

Re: Nairaland Mathematics Clinic by biolabee(m): 2:34pm On Jan 03, 2013
truman u are a demon cheesy

a + b + c = 8
(a+b+c) ^2 = 64
====> a2 + b2 + c2 + 2(ab+ac+bc) = 64
====> hence ab+ac+bc = 48/2 = 24 ------------(1)


(a+b+c)^3 = 512
a3+b3+c3+ 3a(b2+c2+ + 3b(a2+c2) + 3c(a2+b2) + 6abc = 512

I only need one more equation
product of abc

I don tire

1 Like

Re: Nairaland Mathematics Clinic by ositadima1(m): 2:39pm On Jan 03, 2013
Truman155: If a+b+c=8, a^2+b^2+c^2=16 and a^3+ b^3+c^3=64 find a,b, and c.

This question is funny, if we assume a, b, c to be whole numbers then question is wrong. Why?
a^2+b^2+c^2=16
a, b, c can either be -1, -2, -3 or 1, 2, 3 given dat 4 go be fu.ckup. I am still solving oooooo......... a, b, c have to be fractions...

1 Like

Re: Nairaland Mathematics Clinic by BrutusOj(m): 2:46pm On Jan 03, 2013
Krucifax:



s=ut+0.5(a)t^2,s=t(u+0.5at),t=s/(u+0.5at),t^2=s/(U+0.5a), therefore t= sqrt of (s/(U+0.5a))



ur steps are dificult to folo,make it clearer if u wudnt mind
Re: Nairaland Mathematics Clinic by ositadima1(m): 2:48pm On Jan 03, 2013
Infact this question needs a computer program to run sets of fractional numbers, kind of brute force

1 Like

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