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Nairaland Mathematics Clinic - Education (243) - Nairaland

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Re: Nairaland Mathematics Clinic by Profmaojo: 6:36pm On Jun 26, 2017
Engrcharlesid:
The distance of b from c is missing ....... i have solved it before ..

new general maths .
..
ss 2 ...
I have gotten d real question... yes it is actually SSS2 ngm sine and cosine
Re: Nairaland Mathematics Clinic by naturalwaves: 6:38pm On Jun 26, 2017
Profmaojo:
I have gotten d real question... yes it is actually SSS2 ngm sine and cosine
Take d snapshot then.
Re: Nairaland Mathematics Clinic by Engrcharlesid(m): 1:46pm On Jun 27, 2017
Profmaojo:

two boats A and B left a port C at the same
time on different routes. B travelled on a
bearing of
150 and A travelled on the north side of B.
When A had travelled 8km and B had travelled
10km the distance between the two boats
was found to be 12km. Calculate the bearing of
A from C


solution

Re: Nairaland Mathematics Clinic by Olarewajub: 3:06pm On Jun 27, 2017
Someone should please differentiate the following :
1. In cos3x
2. Log (2x-1) base 10
Re: Nairaland Mathematics Clinic by Festy4u(m): 10:15pm On Jun 27, 2017
Olarewajub:
Someone should please differentiate the following :

1. In cos3x

2. Log (2x-1) base 10
Re: Nairaland Mathematics Clinic by DrinkWater10: 12:20am On Jun 28, 2017
benji93:
Attached is a snapshot of the solution
thanks bro
Re: Nairaland Mathematics Clinic by Festy4u(m): 4:28am On Jun 28, 2017
Olarewajub:
Someone should please differentiate the following :

1. In cos3x
Y=ln cos3x
Let u=cos3x and Y=ln u
Therefore, du/dx=-3sin3x and dy/du=1/u
Applying chain rule to the above:
dy/dx = dy/du x du/dx
Therefore, dy/dx = 1/u x -3sin3x
But u=cos3x
Therefore, dy/dx =(1/cos3x)(-3sin3x) = -3tan3x

2. Log (2x-1) base 10
Let y=Log(2x-1) to base 10
Therefore, 10^y = 2x-1
Take the natural log of both sides
Ln 10^y = Ln (2x-1)
Y Ln10 = Ln (2x-1)
Take the derivative of both sides wrt x
(dy/dx) Ln10 + 0 = (1/2x-1)x 2
Therefore, dy/dx =( 2/2x-1)(1/Ln10)

Re: Nairaland Mathematics Clinic by Profmaojo: 2:50pm On Jul 04, 2017
pls someboddt shud help me with this question

find the Laurent expansion of the indicated singularities. hence name the singularities and state the radius of convergence
1. ( Z - Sin Z )/ Z^3 ; Z = 0
2. ( Z - 3) sin(1/( Z + 2)) ; Z =-2
3. Z/(Z +1)(Z +2) ; Z = -2
4. 1/Z^2 ( Z - 3)^2 ; Z = 3
Re: Nairaland Mathematics Clinic by DXhereAgain(m): 1:18pm On Jul 05, 2017
Nice work guys!
Re: Nairaland Mathematics Clinic by kidrossy(m): 8:57pm On Jul 08, 2017
Pls someone should help me with this...

Solve: dy/dx+1/2y=3/2 with y(d)=4...thanks
Re: Nairaland Mathematics Clinic by Kentnickole(m): 6:56pm On Jul 15, 2017
please friends help solve this

4 workers get paid N160000 for working for five days. How much will 5 workers get paid for a day?
Select one:
a. N 40,000
b. N 30,000
c. N 25,000
d. N 10,000
Re: Nairaland Mathematics Clinic by Nobody: 12:46pm On Jul 16, 2017
Kentnickole:
please friends help solve this

4 workers get paid N160000 for working for five days. How much will 5 workers get paid for a day?
Select one:
a. N 40,000
b. N 30,000
c. N 25,000
d. N 10,000

If 4 workers work for 5 days, 1 worker will work for 20 days. Hence, 1 worker will earn 160000 in 20 days. Meaning that the worker will earn 8000 in a single day. While 5 workers in a single day will then earn 40000. Thanks.
Re: Nairaland Mathematics Clinic by naturalwaves: 5:46pm On Jul 16, 2017
Kentnickole:
please friends help solve this

4 workers get paid N160000 for working for five days. How much will 5 workers get paid for a day?
Select one:
a. N 40,000
b. N 30,000
c. N 25,000
d. N 10,000
4 workers get paid 160,000 for 5 days
1 worker will get paid 40,000 for 5 days
1 worker will get paid 8000 for 1 day
5 workers will get paid 8000*5 for 1 day
Therefore,
5 workers will get paid 40,000 for 1 day

1 Like

Re: Nairaland Mathematics Clinic by kingnas(m): 9:41am On Jul 17, 2017
good morning house..pls am in a bit of emergency..we were given an econometrics assingment question to be submitted tomorrow morning..30marks.. Pls i would be grateful if given assistance.. Let me try and type the question as given
Yi = -66.1058+0.0650Xi
Se= (10.7509) ( )
t = ( ) (18.73 )

R^2 =0.9460
n = 20

questions..
1, fill in the missing information
2, will you reject the hypothesis that B2(that is B subscript 2) =0 at 50% significance level?
3, tell wether one tail test or two tail test is more appropriate
Re: Nairaland Mathematics Clinic by kingnas(m): 9:51am On Jul 17, 2017
this is also part of the Econometrics assingment question... Thou the 2 questions are not entirely dependent..

Question
Given a typical regression model with two independent variables x1 and x2

1, find the ols estimators B1, B2 and B3
2,fine the coefficient of determination relevant to the model.
Pls note that x1 means x subscript 1.. And so on...
And B1 means B subscript 1 nd so on
Re: Nairaland Mathematics Clinic by Bennystrings(m): 4:58am On Jul 18, 2017
Please can someone help with this.... Find the derivative of y = cosh^-1 {3 - 2x}
Re: Nairaland Mathematics Clinic by Icosahedron(m): 8:53am On Jul 18, 2017
kingnas:
this is also part of the Econometrics assingment question... Thou the 2 questions are not entirely dependent..

Question
Given a typical regression model with two independent variables x1 and x2

1, find the ols estimators B1, B2 and B3
2,fine the coefficient of determination relevant to the model.
Pls note that x1 means x subscript 1.. And so on...
And B1 means B subscript 1 nd so on


Show us your attempt.
Re: Nairaland Mathematics Clinic by Nobody: 2:28pm On Aug 02, 2017
Bennystrings:
Please can someone help with this....
Find the derivative of y = cosh^-1 {3 - 2x}

-1/(x^2-3x+2)^0.5
Re: Nairaland Mathematics Clinic by benji93: 8:38pm On Aug 02, 2017
Bennystrings:
Please can someone help with this....
Find the derivative of y = cosh^-1 {3 - 2x}

Re: Nairaland Mathematics Clinic by Kentnickole(m): 7:28pm On Aug 06, 2017
martinsfm please come here. I mentioned you here because I couldn't access my mail. I forgot my password. So let's talk...
Re: Nairaland Mathematics Clinic by tobillionaire(m): 8:07pm On Aug 06, 2017
use maclaurims series to expand ln(√x+1/√x-1) to the term x^7
use D'alemberts ratio test to fiind if
(-1)^n-1.n÷n²+1 diverges or converges pls help bosses
Re: Nairaland Mathematics Clinic by martinsfm(m): 5:36am On Aug 07, 2017
Kentnickole:
martinsfm please come here. I mentioned you here because I couldn't access my mail. I forgot my password. So let's talk...
mail for? Dnt gt...explain better bro
Re: Nairaland Mathematics Clinic by Kentnickole(m): 6:18am On Aug 07, 2017
martinsfm:
mail for? Dnt gt...explain better bro

Didn't you send me an e-mail?
Re: Nairaland Mathematics Clinic by martinsfm(m): 8:27am On Aug 07, 2017
Kentnickole:


Didn't you send me an e-mail?
ohhhhh..sorry bro.. I mail lost of peeps...I remember now ...u applied for arm mnths ago, ryt?
Re: Nairaland Mathematics Clinic by Kentnickole(m): 8:27pm On Aug 07, 2017
martinsfm:
ohhhhh..sorry bro.. I mail lost of peeps...I remember now ...u applied for arm mnths ago, ryt?

ARM Life, yes
Re: Nairaland Mathematics Clinic by martinsfm(m): 10:41pm On Aug 07, 2017
Kentnickole:


ARM Life, yes
wt cn u say in general abt d whoke recruitment..fair?
Re: Nairaland Mathematics Clinic by Kentnickole(m): 8:43pm On Aug 08, 2017
martinsfm:
wt cn u say in general abt d whoke recruitment..fair?

I didn't take the interview eventually because I losed interest.
Re: Nairaland Mathematics Clinic by winsome5(f): 8:57pm On Aug 18, 2017
.
Re: Nairaland Mathematics Clinic by Icosahedron(m): 7:18am On Aug 19, 2017
This is probably the only Maths thread on Nairaland, where are those maths lovers, come and pose with Olympiad level problems lets keep this thread active.
Re: Nairaland Mathematics Clinic by personal59: 4:34pm On Aug 21, 2017
please help out

Re: Nairaland Mathematics Clinic by personal59: 4:43pm On Aug 21, 2017
personal59:
[/quote]
personal59 post=59701212:
joshuakdboy:


The picture isn't clear. forward it to my whatsapp on 09056880123 let me help you with it.
[uote author=tobillionaire post=59215663]use maclaurims series to expand ln(√x+1/√x-1) to the term x^7
use D'alemberts ratio test to fiind if
(-1)^n-1.n÷n²+1 diverges or converges pls help bosses
He
masperano:


-1/(x^2-3x+2)^0.5
lp
naturalwaves:

4 workers get paid 160,000 for 5 days
1 worker will get paid 40,000 for 5 days
1 worker will get paid 8000 for 1 day
5 workers will get paid 8000*5 for 1 day
Therefore,
5 workers will get paid 40,000 for 1 day
pleas
Festy4u:

Let y=Log(2x-1) to base 10
Therefore, 10^y = 2x-1
Take the natural log of both sides
Ln 10^y = Ln (2x-1)
Y Ln10 = Ln (2x-1)
Take the derivative of both sides wrt x
(dy/dx) Ln10 + 0 = (1/2x-1)x 2
Therefore, dy/dx =( 2/2x-1)(1/Ln10)
e
Engrcharlesid:
The distance of b from c is missing ....... i have solved it before ..

new general maths .
..
ss 2 ...
LPP
Festy4u:

Let y=Log(2x-1) to base 10
Therefore, 10^y = 2x-1
Take the natural log of both sides
Ln 10^y = Ln (2x-1)
Y Ln10 = Ln (2x-1)
Take the derivative of both sides wrt x
(dy/dx) Ln10 + 0 = (1/2x-1)x 2
Therefore, dy/dx =( 2/2x-1)(1/Ln10)






Please anyone can help with it please its urgent

Re: Nairaland Mathematics Clinic by Nobody: 6:10pm On Aug 21, 2017
personal59:
Help pleaseLPP






Please anyone can help with it please its urgent

The picture isn't clear. forward it to my whatsapp on 09056880123 let me help you with it.

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